LSR 2-1 Shovelhead

No Stupid 1950's megaphones, No Aluminum Butt Plugs

Welded Non Removable Baffles

All LSR 2-1 designs have a welded-in, non-removable, baffle.  LSR Pro Stock 2-1 designs have no baffle (optional welded-in baffle at time of order).

00-1416 Quiet Baffle is standard on Black Hole designs and optional on Spyder and +5" Slash Cut designs.

There is no possibility of a baffle or end cap coming loose because there are none. Zero maintenance for life. No tone change over time,

Our 00-1306R  Pro Stock Resonator designs have a welded-on non-removable Db reducing resonator with zero restriction.

For those of you who want to "tune" your exhausts...Not ours as they are already optimized. Consult your baffle advisor for appropriate anxiety medication.

Magneto Clearance

Born Free

Customer project bike exhaust for Born Free Show. Had to be done here due to a non standard foot peg location off or the nose cone. Custom two part frame mount. Customer takes care of chroming. Full access

00-1104 Silver Ceramic

Customer writes: " Good evening, I don’t know if you will remember selling me the exhaust for my project 76 FXE.  It’s done and it runs very nice, probably the best it’s ran in the 40+ years I’ve owned the scooter.  I attribute a good share of that performance to the RB Racing LSR exhaust system.  Thanks from here in Wyoming. Larry."

New Items: LSR 2-1 for Chopped FX/FL Chassis

Customers with extended forks in FX and FL Chassis have asked us for a more upswept LSR 2-1 Exhaust so that the tail does not angle down. 

FL Chassis: Clears kicker. For forward controls or mid Shovel controls (Pictured Above). Clears rear or forward rear m/c locations.  
00-1145 Turn Out; 00-1446 Slash Cut. 00-1446 Slash Cut pictured above. 

FX Chassis: Clears kicker. For forward controls only with front mounted rear m/c. 00-1142 Turn Out; 00-1144 Slash Cut.

Shovelhead Part Numbers: LSR 2-1 Fitment:

00-1004 / 00-1005: FX Models; Mid Peg; Only B Style; Will clear OEM Kicker. OEM master cylinder location (rear). Compatible with oem 4 speed and 5 speed. Not validated for 6 speeds.

00-1436 / 00-1437: FX models Forward Controls: C Style;  Only with forward controls and aftermarket front mounted rear master cylinder. Transmission: 4 / 5 / 6-4 compatible

00-1006 / 00-1007: FXR Shovel; B Style; Mid Pegs; With electric start OEM 5 speed. Not validated for 6 speeds.

00-1427 / 00-1428: FXR Shovel; C Style; Forward Control Brake w/ Push Rod to OEM Master Cylinder location (odd setup); With electric start OEM  5 speed. 

00-1104 / 00-1105 / 00-1108: FL models: C Style only. Transmission: 4 / 5 / 6-4 compatible

00-1442 / 00-1444: FX Frames; B Style w / Upswept Tail Section (Extended Fork Choppers or rider choice) ; Fits Mid OEM controls with rear mount m/c; Or forward controls with  front mounted rear master cylinder; Transmission: 4 / 5 / 6-4 compatible. No floorboards.

00-1445 / 00-1446: FL Frames; B Style w / Upswept Tail Section (Extended Fork Choppers or rider choice) ; Fits Forward controls and aftermarket front mounted rear master cylinder. Transmission: 4 / 5 / 6-4 compatible. Has been fitted with MId OEM Shovel controls. No floorboards.

Baker 6 into 4 Transmissions



These 6 into 4 transmissions are 1 5/8" wider that the OEM 4 Speed. 

Our C Style Designs (FX / FL / Rigid) seem to fit although it is nothing we have done in our shop.  Customers have installed them.

Exhaust is the Last Item


The last item in your build is the exhaust...and guess what... There can be conflicts and it is now, you determine,  the exhaust's fault, not the other parts fault. The aftermarket ignition and wires on the left above are definitely not OEM.  Customer blamed the exhaust, not his aftermarket ignition wires. He said "Just move it down". It doesn't work that way. We said it takes another design due to the wires.

In this case we made a new exhaust in another FX Shovel fixture with a front pipe way further down (below) that would clear the ignition wires.

Of course as soon as we made the second pipe for the customer he cacelled the order...saying something about offending him. Go figure. 

We run into non-oem parts like aftermarket highway pegs, non-standard forward controls, custom floorboards, and different master cylinders. Be clear what you have before you order. It is not the exhaust that is the problem.

FXR 00-1007

Customer writes: "Hi Robert - this exhaust is perfect! Installed smooth as silk.

Rebel Two for Two

Customer writes: "Sorry for send in pics late a relapse with my health. Love the exhaust in both bikes. Sounds great and help with performance. Highly recommend to everyone.

00-1438 C Style 1979 FX

Customer writes: "I love the exhaust system sounds great . My S&S super E tuned easier. Thanks Don."

No plastic.

00-1006 Year+ Later

Customer writes: "Hi I ordered a pipe from you about a year and half ago silver ceramic with black shields. I was just reading a bunch of whiners on a forum complaining about pipes they never ordered from you. My pipe on my 83 FXR is awesome. I was told 6 weeks I never called during that time and my pipe was ready in about 5 weeks I believe. I’m a disabled vet and I also received a veterans discount from RB Racing that was much appreciated. Just a late thanks. The bike rips.

Semper Fi 

00-1005 Finished...14 Years Later

Customer writes: "Just wanted to say Thanks!  The pipe and the bike turned out great. I can't say enough about how the pipe just fits perfect and looks even better so I included some pictures. The difference in performance is so amazing that I actually just placed an order for another exhaust pipe for my other bike. Thanks again. Steve !"

Pipe was made in Silver Ceramic 14 years ago...Project got delayed and was finally finished in Black by the customer.

00-1427  1982 FXR:"C" Style for Forward-Mounted Brake Pedal

It's always something.

Customer with a 1982 FXR in a ground up rebuild with aftermarket heads installed forward controls with a pivoting rear brake rod to the OEM Rear Master Cylinder. FXR Shoveleads were mid peg not forward control.

Our standard 00-1006 "B" Style FXR Shovel Turn Out (45 Deg Rotation) would not fit as it was designed for mid-pegs. We designed a new "C" Style system to clear the rear master cylinder brake rod. 

The FXR Shovelhead exhaust mounts both to the transmission and to the rear rubber Lord mount (OEM #65780-82). This customer asked for 45 Degree Turn Out in Dual Coat Black Ceramic.

No, we do not make three bolt exhausts. 

This "C" Style does not fit mid controls. Only our "B" style fits mid controls (00-1006 Turn Out; and 00-1007 Slash Cut)

"C" Style Part Numbers for the above exhaust: 00-1427 Turn Out; 00-1428 Slash Cut; 00-1429 1 3/4" Pro Stock.

00-1004 Down Under

Customer writes: "Got the pipes brother. Fitted perfect... Sweet as hell. Fucking love them. Thank you so much.
Shovel Trouble ......Pic Attached If you want to put on your Web Page

Kind Regards, John".

00-1104...Project Finished

Customer writes: "Hello RB Racing...Remember me?  Mike W.  Bought my exhaust in May of 2018.  As promised...   here's some Pics. 

I finally finished my 1974 Bobber Project.  Sorry no sound....   Because they sound GREAT!

Hope you are well and

Thanks Again.

00-1105 Branko Built

Customer writes: "Hey Bob just fitted first set of ceramic coated pipes on 78 Shovel, guy loves them sounds good but we did modify the kicker pedal to clear but was thinking could you put indent there where other pic is shown pipe rubber (just a thought he didn’t want the flip out kicker) otherwise all good.

The other set I am still building the motor so will be a while before I send pics of that exhaust fitted, thanks. Branko."

00-1105 "C" Style LSR 2-1 Slash Cut in Dual Coat Black Ceramic. Shovels rule Down Under.

00-1104 1983 FXDG Wide Glide

Customer writes: "Beautiful pipe. Shake down and tuning run, works and sounds beautiful. Thank you very much." 

00-1104 LSR 2-1 Turn Out, C Style, in Dual Coat Black Ceramic.

00-1105 Slash Cut FX Forward Controls

Customer writes: "I received the exhaust Saturday.  It is beautiful!  That chrome is perfect. I can see now why you do not want to cover them with heat shields. I'm afraid to put them on, they will make the rest of the bike look bad!

I installed the exhaust, looks and sounds really good.  Find attached a picture of the completed project. Thanks, Matt D."

Machined Shovelhead Flanges

To insure correct port sealing and geometry we machine the Shovelhead port spigot to 1.745" to insure roundness and then TIG weld the flanges to the primary tubes. We've been making Shovelhead exhausts for over 40 years for FX and FL models in baffled LSR 2-1 Turn Out and Slash Cut and full race LSR 2-1 Pro Stock versions.

Notes on Shovelhead pipes:

C Style fit FL models 4 speed. C Style fit 4 speed FX models with forward controls and forward mounted master cylinder. 

B Style fit 4 speed FX models mid or forward controls

See notes lower on page on kicker clearance

00-1007 1982 FXR

We have made new fixtures for the short-lived Shovelhead FXRs and FXRT (mid peg). B Style Only. The LSR 2-1 mounts off of the transmission and also uses the stock OEM Lord Mount. For electric start with 4 speed transmission..

00-1007 LSR 2-1 B Style Slash Cut. Not validated for 6 speed transmissions. 

00-1007 Five Speed FXR Shovel US Navy


Customer writes: "Fits a 5 speed shovel no problem.. I’m still working on restoring this. I’ll make sure you get a nice photo for the website when it’s complete in a month. But you can update your page as verified for fitment. Thanks Chris!"

Update" "Shovel 5 speed FXR still runs strong."

Definitely not a boat anchor. Long gone are the days of $2500.00 to $3,000.00 basket case Shovels. These are commanding more money than later models. Old School reality versus bizzaro FXDR's. They sound different. Spokes, ape hangers, sissy bar, a set of points or a modern digital ignition...You are committed with a Shovel. That loping steady idle.


Customer writes: "Here is a picture of the pipe on my 1974 FXE looks great and performs even better, thanks for a superb product." 00-1004 LSR 2-1 Turn Out


Customer writes: "I received exhaust today. Installed tonight. Very pleased with the quality and fit. Mounting was straightforward. Non folding kicker, floorboards, saddlebag guards, etc. all cleared the pipe, and the frame mount was study. Overall very happy. Will send a picture or video once I get the bike out, that you are free to share. 

Bike runs and sounds great. Only issue is melting the side of my boot on the pipe. Will try to find a short heat shield to fix that. Otherwise very happy. Pic of the bike attached. Thanks again, Jeff".

00-1104 LSR 2-1 Turn Out C Style in Chrome.

Tanks On..Time to Ride

Customer writes: "Finally got tanks on. The exhaust system is wonderful example of craftsmanship. Thanks for all your help and information. Thanks.. Robert B."

00-1104 LSR 2-1 Turn Out C Style in Silver Ceramic.

36 Years

Customer writes: "Bike runs great! These headers sound better than any of the 20 sets that have been run in 36 years on this old Shovelhead (belt/chain). This was an easy install and looks great. This bike has been run down Great Lakes Dragstrip, Indy and many alleys of Milwaukee. Rode along Willie and his family to Elkhart lake. His boys road café racers. This bike’s best et was set with Joe Stadler 12.01 (original builder with Ron Troc) riding at Great Lakes Dragaway in 1980. I have no doubt she’d run 11’s now. Off to the tuner to see."

00-1108 Slash Cut +5" C Style

Blew By You

Customer writes: "Here is a pic of my Shovelhead using your 2into1. Sound is amazing and so is the performance. I will be ordering from y’all on every bike I own in the future." C Style

Rebuilt in 1997...Born in 71

Customer writes: "The best move I ever made, my motor and trans were rebuilt by Gary Stroud 1997 all Harley drag Pro Gas world's record holder and putting a RB Racing exhaust on my 1971 FLH. Thanks. It runs, looks and sounds great." We extended this 00-1104 a bit at BA's request. C Style

Jimmy The Juice

Customer writes:"" Thanks for the pipes! They were worth the wait. Long haul up to Calgary Canada. Attached are some pics of my 60th birthday present to myself. Jimmy The Juice rides again! Jim." Black Ceramic LSR 2-1 Turn Out (Dual Coat) 00-1104 C Style. Eat your hearts out Twin Cams. 

00-1105 Ceramic Black

Customer writes: "Hi, Just a few pictures of the end result! The bike runs a lot better with the new pipe, better gas response and a nice roaring sound. It took a while, but was well worth the wait! Cheers, Enrico"

00-1105 C Style LSR 2-1in Ceramic Black. Old School with Mags...Class ride.

Red 4x4 and 2x1

Customer writes: "My second pipe from your master craftsman.... Again perfect... Guess I will need another ... Ray". 00-1004 LSR 2-1 Turn Out.

Perfection...well, not really

Customer writes: "RB, This is my 3rd exhaust from your company. First was a Heritage Softail, second was a Road king and now this Shovel,   I knew what to expect, Perfection!  What more is there to say?  Still would like to see the exhaust rear bracket in chrome.  And I got lucky for a second time as you had it already made.... Thanks!". 

Beautiful bike...puts new Dressers to shame. C Style

C Style LSR 2-1 for FX Shovels...Mid Peg and Forward Controls

Note that this bike has forward controls. It does not clear the stock mid peg models with standard master cylinder location.

00-1104 in Black

Customer writes: "It is rare in today's world where a product does everything it's supposed to. Thank you so much. Don". C Style

Keeper: 00-1104 in Chrome

Customer writes: "Sending you a picture as you requested, have installed your pipe, this is obvious . 88" S&S nothing fancy, have had this bike since 1984, been to 45 states riding her... Ordered your pipe and yes it took a while, but what I got for my patience was a fine crafted piece, well worth the wait ,,, love it ! Bike runs nice with this pipe, sounds nice when I roll it on.. To all the bitches out there who complain about time frames, cost and customer service ... Go buy your Mexican stamped big name pipe for 8 bills plus, that's all you deserve ... These pipes are only for the few that understand... Will be ordering another for the 72 Super Glide 93" I'm building... Thanks RB !!!

We build to order. Over 700 part numbers and four different finishes. It does get complicated. C Style

47 Years and 10,000 miles later..1976 Super Glide

It's hard to dig up an un-molested 37 year old FX Shovel to do prototyping on... Mid peg, stock 4 speed, highway pegs, kick start. B Style 00-1004 Turn Out being prototyped. B Style

1976 Super Glide with 10,802 miles. We needed a stocker for prototyping exhausts and this one is dead stock. People pass away and the iron goes into the back of the garage...the iron lives on and we fade away. We're getting the Super Glide freed up and running for a friend after we finish our prototyping our LSR 2-1 exhausts. It's been a long time since we worked on an FX and we needed to check and update our fixtures.

We build to Order...You pay when we ship

Customer writes:" Got my exhaust system the other day as promised. It was flawless, went on perfectly, and the mount was good too. I will fire it up in a few days and see how it runs, but anticipate good results from all I have heard. Thanks again and it was worth the wait, no matter how many people have slammed you guys for not being a cookie cutter operation. Tim"

00-1004 FX Shovelhead Turn Out LSR 2-1, for stock 4 speed. Ports are a machined part and heliarced into place for a perfect fit. B Style

Road Less Traveled

Customer writes: "Hi there, I just wanted to send you a pic of my shovel ... check it out ! You can put it on your website if you like it ... I love this exhaust ! Cheers Mischa.

93" Dual Plugged Iron

This is our new "C" style Shovelhead pipe. We threw out all the old parts and started over even though we've been making them since 1978. It was time to revisit things and make some corrections. Shovels pose particular problems with their single bolt exhaust ports, and cylinders that can be tightened down out of inlet and exhaust port alignment. Some engines like the one above are strokers with taller cylinders. Exhaust ports are usually worn a bit and getting gaskets to seal is often a bitch.

We addressed the port alignment issue by creating a separate piece for the flange and the extension into the port and then welding the pipe to this piece. We also make the pipe in two separate pieces which takes into account differences in cylinder height for heads which have been decked and taller cylinders on strokers.

"C" pipes will clear kickers and we made up some laser cut and powder coated steel brackets for the frame to pipe mounts.

We are designing newer "B" style pipes. C Style Slash Cut shown.

1975..Where were you? Or were you at all?


Customer writes: " I promised some pictures and sorry it took so long. I installed and LSR 2 into 1 exhaust on my 1975 Harley FLH. The fit was perfect they even cleared my factory floor boards. I am glad someone is still making a quality exhaust for the old shovel I thought I was stuck with drag pipes until I found your web site. The sound and performance is great and I get a lot of questions about the pipe. Thanks for still making a quality and sharp looking product. Paul".

Good style doesn't change. There's something timeless about Dressers. If something works, sits right, and gets you where you want to go ..What else is there? Anyone can buy a $35,000.00 CVO. It the end it's still just two wheels and a motor. Motorcycle. Rolling Thunder, 1975 style. C Style

Ms Blue..93"

Customer writes: "Hi Folks, Just wanted to let ya see what I've been working on for the last few months and to say Thank you for the super pipe I got from you. It looks great & sounds even better and I got it 4 days after I ordered it, can't beat that! Finally I have a pipe that doesn't leak and fits perfect. Bike was completely overhauled during the winter including the dual plugged 93" S&S beast. Still getting her broken in but it feels great already, Thanks again for a great pipe, best I've found in 30+ years of Dresser ridin'. Best Regards, Larry".

00-1104 FLH Shovelhead Turn Out C Style rotated 45 degrees in chrome.

Netherlands...Old School

Silver Ceramic Turn out...Bag follows frame..Very Cool! C Style

LSR 2-1's Down Under

We ship LSR 2-1 exhausts direct to customers in Australia. Middlemen always seem to want to sell things but not actually buy things...and when they do, the price goes sky high and often they order the wrong parts for the customer who has to wait forever... Too many layers. 

We "Build to Order" all systems no matter who you are or where you are and do not try to fill distribution channels full of parts. Offering 700+ parts numbers in four different finishes and in four major product ranges from Full Race to Quiet gives our customers the exhaust system best suited for their intended purpose. We ship FedEx Economy on Mondays and Thursdays.


Customer writes: "Greetings to all at RB Racing, Here you go! It must be exciting for you to see the end result of your products after installation! WOW is the only response I have after firing the motor! What a masterpiece of talent by all who designed and completed this exhaust system. Unbelievable fitment-precision to say the to how every piece had perfect alignment, all the way from the exhaust port to the mounting bracket. Thank you so much for all the email responses (even though I exceeded my limit at times! haha). And you know thats because of listening to too much negative crap from stupid people which seems to put our society in a state of paranoia....

After stumbling onto your website over a year ago and spending literally countless hours studying it, it confirmed what I've always known, that America is the place where small business and people of integrity coupled with great ideas can create greatness!! Pipe sounds and performs awesome after I got everything dialed in. Don't have any dyno numbers-don't care-cause I got what I wanted and it is better than what I had and It was hand crafted for MY bike, not to mention talking to you guys personally instead of some schmuck overseas or voice mail..Lookin' forward to the next time and Lynn, your NOT a nag! LOL Sincerely, Phil." C Style

Annie Leibovitz..Watch Out

Customer writes: "Hi, You asked for a picture when we spoke on the phone. I'm no professional, but here goes a shot. Thanks for a great exhaust. Tim". 00-1104 Turn Out C Style rotated 45 degrees. 

Flange System

Typically, you bend up your primary tubes, push them through the Shovel flange and weld the pipe in place. There are always minor variations in this process. For example, a small angular or rotational error in a pipe with four bends in it throws off the location of either the port end or the collector end of the primary tube. Secondly, the bend at the exhaust port is never truly "round" as the tubing stretches to the outside of the bend and the roundness can be off quite a bit. It can easily be more than .025" out of round.

We decided to machine the exhaust port slip in a lathe and precision heliarc it to the Shovelhead exhaust flange. During the production welding process these parts are welded last to insure perfect alignment. Each port slip area is perfectly round and has the same seating depth. If you use new exhaust gaskets you should have a perfect fit.

LSR 2-1 Pro Stock

Raise the dead. Blow people off of their bus benches. Kick Twin Cam ass. Old school gets promoted to the fast lane. You asked for racing Shovel pipes so we are making them. 93" Shovel. Dual Plugs. 10.5:1. Big cams and Sting Ray seat. No baffle.

That guy in the new $38,000.00 110" CVO FLH won't know what hit him. C Style

125 MPH Quarter Mile...Shovel with Bags

LSR 2-1 Pro Stock Shovelhead 00-1382, 2" C Style....and you thought your Twin Cam was fast. C Style

Customer writes: "Greetings RB Racing Staff.  I was in the market for an after market exhaust for my father's 1977 FLH Shovelhead. I had no real idea that there aren't many options for the older bikes. I searched through miles of internet junk until I came across your brand on a forum. I had never heard of the RB Racing product before so I quickly became interested after visiting your web site and seeing that you had exactly what I would need. I sent one question in an email and got immediate feedback. I settled on the 00-1097 C style in a Titanium finish.

The research I had done had me a bit concerned over the amount of time it would take to get my pipe after ordering it. I ordered in the first week of November on the web site and was hovering at a month when I sent an anxious email. Lynn got back to me that day with the tracking number telling me the pipe was on its way. It arrived December 14th, which worked perfect because my Dad's birthday is the 15th. Probably the coolest birthday present he has opened in a long time. 

I'm no mechanic. So when we took off his old straight pipes and started with the install on this I was a little skeptical. I was so happy when we had the new LSR's on in about 20 minutes! The gaskets fit perfectly, all the bolts and brackets were a tight seamless match and the system is on so tight that you could stand on them. The research and design put into this system is outstanding. I had figured we would have to do some adjusting with the rear mount for the simple fact that nothing goes on without some issue. There was no issue, snag, or any sort of problem. 

 The picture from March 7th. One of the first real sunny days here in Connecticut. We have not had the chance to put any real mileage on yet. There have been a few trips around the block to get a sense of how the system acts. I was surprised to notice that when you are riding it has a smooth, subtle rumble. With the pipe being behind the ears it makes a big difference rather than having the front pipe on a standard system right below you. But make no mistake, the pipe is LOUD! Down shifting and letting off makes that thing bark to no end! Awesome! The performance difference was noticeable as well. There is a much quicker response at the low end which gets the RPM's up quick. The bike is fairly built as it is so this only helps it be a super sleeper. 

I can't wait to see the looks it gets when we do get out this season. Who has a Titanium pipe? Who knows about RB Racing here in CT? We do. And we are going to be spreading the word going forward.

 Again, Thank you for making such a superior product. We will be enjoying it until that bike runs no more. Mat" C Style

More Pro Stock..86" Stroker

Customer writes: "What can I say, a bad ass pipe for a bad ass Shovel. I have had this bike for 25 years and it was built 15 years ago: 86 c.i. S&S stroker S&S Super E carb, and a Crane Fire Ball cam. It always ran pretty good with straight pipes. I thought about a Thunderheader but I would have to modify it to fit, then a friend told me about RB pipes, I saw that they made one for an FLH that fit right on and it f#%#kin fits nice looks great, It isn't even dialed in yet and guys with new 96in baggers are on it to keep up, It put new life into an old bike that I love to ride. Thanks guys. Frank"

00-1095 in chrome.

93" Shovelhead..Old School

Customer writes: "Here's a pic of your pipe on my Shovel. Its a 93 inch S&S stroker kit, 514 cams, Super E carb. The fit, chrome and workmanship on this pipe are fantastic, I'm very impressed. If anyone asks how this pipe sounds you can tell them its all Harley. Its deeper and stronger sounding than ever. Whats really impressive is how hard the bike pulls from 3 grand to about 6000 RPM. The time between gear changes is much quicker than when I ran drag pipes. I have some sorting out to do with the carb which I expected. The only bitch I have is how long it took to get the pipe!!!  The mounting bracket you sent needed to be reworked and spaced out but thats no big deal. Anyway, I'm very pleased with the pipe and will be looking for one for my wifes Softail in the future. Thanks, Dave"  

It's a miracle we still make these. Lucky it's short term memory that goes first. 00-1094 Chrome Pro Stock 1 3/4" B Style. It is fun to outrun a new Twin Cam bike though.

2" Shovelhead Pro Stock C Style (FL)

We hand make all our LSR 2-1 Pro Stock systems but a 2" Shovelhead requires a lot more work. Sort of an odd request, but this one is for a long term customer of ours who has set numerous records with Shovels with our exhausts and is now planning to go to Bonneville with a built 113". The pipe is a 2" LSR 2-1 Pro Stock 00-1381 and is headed off for a Silver Ceramic finish. Customer runs a ported Super"D" with Thunderjets and a ram air system. 

You can't get a 2" pipe at the ports as we can on our other systems so we have to "bell" the 1 3/4" into the 2" primaries. Front primary slips and the exhaust is designed for the taller engine. The customer asked for O2 ports so we installed them.

On all Shovelhead pipes, including this 00-1381 Chrome 2" Pro Stock, the front primary tube is a slip fit. We do not offer heat shields for Shovelhead designs. For a Dresser or FX with forward controls. Not for FXR.

The front primary tube has an Oxygen Sensor Port as we have done for over 20 years. You can use a RSR Air Fuel Ratio gauge to monitor and set your carburetor's fuel mixture.

You Meet the Nicest People

1. Potential Shovelhead customer sends us 12 emails wanting a 2-1 exhaust which we assure him we can make. He then tells us someone else says our exhaust won't fit and insults us. He then, after cruising endless forums, has someone custom make him a 2-1. It does not fit, the flanges are crooked and he is out a lot of money. He then emails us for the 13th time and asks us to make him an exhaust. We decline and tell him to get bent as we remember what he said in his last batch of emails. We suggest he go back to his forum cruising and try for bad decision #3...firstly in insulting us and, secondly, wasting his money on a custom pipe that did not fit. He then tells us to f-off again. Go figure. Life is too short for this shit.

2. A guy calls us up and asks us if we can make the 2" pipe pictured above for a 128 CID Right Side Drive Shovelhead in a custom Chassis on an engine that has 3 bolt STD cylinder heads. The simple answer is that there is no fixture for something like that and if we attempted to do it it would be pure guesswork on our part. We told the guy to send us a picture and we would look at the issues and come up with a response. We were rewarded with "If you can't do it you are a bunch of fkking assholes".

We sent the guy the following response:

"It makes no sense to berate someone who says they do not make something for what you have.

You simply are not going to get anywhere with that approach.

The feeling is mutual.

We have three rules:
1. We like the product
2. We like the money
3. The customer is agreeable

Any violation of the three and we do not do business.

Any custom item chews up several days of fabrication. Overhead is > $2000.00 per day. If Coatings are involved there are additional expenses. Lots of people here involved to get the part made and out the door. They all have to get paid. If the three rules are OK we go ahead at stated prices even if it makes no economic sense.

In your case there is no amount of money that would interest us.

You have not dealt with us. Dealing with us means there is a transaction. Thousands of people do it every year and they are quite pleased. Only people like yourself who do not deal with us, have an agenda, and end up angry and pissed off at the world for whatever reason go their way fuming and ranting.

Take your venom to the next vendor. Another one who does not make something for your ill-defined goal.

As stated Good Luck.

RB Racing"

Shovelhead Kickers

Most Shovels are electric start...However...People ask us if their kickers are going to clear our exhausts...The general answer is yes...but that gets complicated when people start changing transmissions and master cylinder and brake system locations. 

Our standard reply is if you have some oddball application you can get a 3/4" longer kicker shaft from Jim's USA...sold by all sorts of vendors...even on EBay. Different part numbers, generally 33096-54AL.


Above: Here we have the OEM non-folding kicker. It clears our B and C Style exhausts on the vast majority of our applications. None pinch bolt location.

Above: The late model FX Style folding kicker has even  more clearance our LSR 2-1 exhausts. You may have to reposition the kicker shaft in the transmission as the pinch is not at the 12 o'clock position.

Five Speed Transmissions: Generally 5 speed transmissions are not an issue

Six Speed Transmissions: We are not configured for six speed transmissions which push things out over 1".

2" Shovelhead B Style (FX)

00-1382 LSR 2-1 Pro Stock 2" Shovelhead for stroker FX series. Headed for ceramic coating.

SuperFlow CycleDyn...Testing a Running Motorcycle

If you are going to use a chassis dyno it has to be a tool and not a toy. At RB Racing we use the SuperFlow CycleDyn as it best emulates the real world. We use it for development and not for publishing "dyno charts". Most of our work is with Pectel SQ6M controllers which have extensive internal datalogging and playback capabilities up to 2000Hz sampling rates. With the SuperFlow we can program specific tests and transient sweeps with our turbocharger systems up 750 hp in inertial mode or 500 hp in Eddy Current controlled accelerations.

For those of you who like Dynojet "Dyno Graphs" this article.

Steve Cole (TTS MasterTune) who has spent untold thousands of hours on every dyno imaginable has this to say about CycleDyns:

Steve Cole: "In the development side what I can say is the SuperFlow when setup properly emulates the real world much better. As an example the only way to get a DynoJet to give you HP and TQ is a WOT unloaded run. The SuperFlow allows that plus just about any other combination you like with real torque output. So what does any of it buy you becomes the question. I can tell you that if we tune to a DJ and get the best we can, then repeat on the SuperFlow using real world acceleration rates for the engine being tested the results are very different. Take the final calibrations and run them in both dyno's unloaded and the DJ developed type calibration will show the most HP and TQ in those conditions, on both the SuperFlow in DJ mode and the DJ. Then take the SuperFlow controlled condition calibration and load it in the bike the power will go up when tested in the SuperFlow mode again which can only be done on the SuperFlow. 

Now the hooker, take the bike and put one of the finished calibrations in it and give it to the customer and say go ride it and come back after you've ridden it well, to know how it feels/runs. They come back after an hour or so then load the other calibration and ask them to do the same riding over and come back again. Each and every time we have done this every customer has picked the calibration that was done on the SuperFlow under the controlled acceleration modes! So pick what works for you but there is a difference. Does it take longer, does it end with a measurable difference............. YEP!"

When we have turbo bikes like our Road Glide Turbo it gets a bit interesting to go testing in LA traffic with police, cell phone cameras, and freeway cameras. We still do real world riding with data acquisition as the real world is where you ride.

People want "Dyno Sheets"...see below. We aren't going to test every damn camshaft, compression ratio, piston configuration, cylinder head etc as there is not enough money nor time to do so. However, we do testing for our own race development, R&D, and our personal development platforms.

Dyno Sheets

People call us all the time asking for "Dyno Sheets" and we patiently tell them we do not provide self-serving graphs predicting fantastic horsepower and torque gains. Plenty of customers send us dyno sheets but, as we've been at this a long time, we know the tuning game is too complicated to provide numbers just to sell an exhaust. Tuning is a multi-variable process. 

When the EVO motors came out Jerry Branch published his famous manifesto on tuning 80" EVO motors...In short, unless you bumped the compression the horsepower was not forthcoming. Same these days. In 2014 John O'Keefe of Branch O'Keefe ran an extensive series of tests on OEM Twin Cam cylinder heads to see if he could offer a "less expensive" ported head as everyone with a grinder in his garage was suddenly an expert at cylinder head porting. John found out that any attempt to clean up the ports killed the flow and port velocities dropped. He scrapped that idea and kept his well-proven chamber modification, porting and valve replacement system.

Logic seems to be in short supply when it comes to tuning. Tuning is not a pipe changing exercise. The world these days is full of customers who agonize endlessly over what to buy and then dump these parts on some unsuspecting "shop-tuner" expecting miracles. It just isn't going to happen. Coordinated development is expensive and time consuming. If it was NASCAR developer they might spend days searching for a few hp or a different curve for a specific track.

If you are looking for warm cuddly sheets we are clean out of them. We are tuners and you can buy all the trick parts in the world and a guy with a well tuned mild bike with a good power to weight ratio will kick your ass. Real world. Find a good tuner or become one. Look in the mirror.


Whenever you look at an exhaust and see it caked in black soot you know the bike is not running or tuned correctly. Back in the mid 1980's we did a carburetor development program for Keihin Corporation for their 41mm CR Race carbs on both Shovelheads and the new Evolution motors. When we were finished the bikes got 56 mpg cruising and 46 mpg if you ran them harder...and after 500 mile tests the pipes were perfectly clean inside and the exhaust ports were dead clean.

If you take the exhaust system off a modern Closed Loop BMW, as we have, you will find them dead clean or whitish inside. Harleys should be the same.

We always ask what mileage people get from their "tuned" or modified Harleys after "Dyno tuning"....The universal answer is 37 mpg or less. If they don't know, we ask them if they have to gas at 100 miles. Most do.

Once a customer bought an exhaust from us and took his bike to two different dynos in search of the "117 Hp" he was looking for for his 103...He got 110Hp. After pissing and moaning we told the guy to give us our exhaust back and we found it caked in soot. So much for tuners and their tail pipe sniffers that see lean reversions...They just kept adding fuel. You tell the customer to put on our RSR Air Fuel Gauge to monitor the mixtures F/R in the real world...No, they want a "Dyno Tune". We have dynos...we know what they do and can't do.

Logic plays no part in people and their toys. EFI is complex...put in larger injectors and all of your warm up, synchronous and asynchronous fueling is out the window, Brave new world.


Pictured above is the exhaust port from a 2017 Dyna Low Rider S with about 100 miles on it. No soot. Delphi engineers seem to have done a very good job. Looks like the port you would see on a BMW. Now, when your "Tuner" gets finished with it, it will most likely be full of soot. Logic plays no part in people and their toys. EFI is complex...put in different cams, change air cleaners, port the heads and all this goes out the window. Brave new world.

No soot.

RSR Air Fuel Ratio Gauges...Real World Tuning

The Mother of all gauges! Not a gauge, but a precision tool that will tell you exactly what your engine is doing in real-time. Gives you instantaneous read-outs of air/fuel ratios from 17:1 to 10.5:1 and indicates maximum power ratios. Four color display is easily read in direct sunlight and automatically dims at night. Waterproof, billet aluminum construction. Your significant other will cheat on you but this gauge will never lie! It won't keep you warm at night, but a perfectly running engine will look and sound the same when you wake up next to it the morning after.

Single RSR O2 Gauge: Reads the front cylinder in non-efi models. It is simply the best way to evaluate the tune of your motorcycle and saves expensive and often inaccurate dyno time. Real world tuning while you ride...Observe and then make adjustments. Mounted permanently. Waterproof.

Dual RSR O2 Gauge: Compatible with OEM narrowband sensors. For non-closed loop models (1999-2007) we can supply the LSR 2-1 exhaust with two 18mm O2 sensor ports and two high temperature Bosch O2 sensors: Part Number 06-1026. Real world tuning while you ride...Observe and then make adjustments. Mounted permanently. Waterproof. Use TTS Master Tune Software to adjust the VE tables for the front and rear cylinders.

Mounts....Roll Your Own or Buy One

The gauges have a center back mount 5/16" x 18 x 1/2" Stainless Socket Head Cap Screw and stainless lock washer. You can fab your own bracket for this or use the 06-1025 hard anodized Billet Mount System for either 1.00" or 1.25" handlebars $49.95. Optional is the 06-1024 two piece laser cut 304 Stainless Steel mounting tabs for either near handlebar clamp or up the handlebar mounting: $9.95.

Tune in the Real World: RSR Air Fuel Ratio Gauge

Since we have been doing closed loop fuel injection systems for Harleys for more than 30 years and have been putting O-Sensor Ports in our exhausts for the same amount of time, we have both single and dual O2 ports for our full range of exhausts. Our RSR Air Fuel Ratio Gauge is the best investment you can make for monitoring and optimizing your engine tune.

All LSR 2-1 exhausts come standard with one or two O2 ports (Sequential EFI models)...18mm or 12.5mm. O2 or Lambda sensors are a necessity for either carbureted or non closed loop efi (Weber Marelli and Early Delphi) Harleys. We should know, as we have a lot of experience with them and have been doing Closed Loop EFI systems since 1989. 

The Single and Dual gauges ship with six feet of MIL-W-22759/32 wire. The first 24" is Raychem DR-25 sealed on both ends. If you wish to have a connector at the 24" point there is a $50.00 charge to install either six position (single gauge) or eight position male/female Deutsch DTM connectors with Raychem DR-25 sleeving.

The gauge is housed in a hard anodized round enclosure in a standard 2" format with a 2.250" bezel, center back mount, with a 5/16" x 18 stainless socket head cap screw. The gauge will show fuel ratios from 17:1 to 12.0:1 (or richer). The gauge is visible in daylight and automatically dims for nighttime operation. Only a single L.E.D. illuminates.

Very easy to interpret at a glance. Scale is, left to right, lean to rich: three greens, three yellows, two orange and two red l.e.d.s. You simply cannot "read" spooling digital numbers.

The white arrow indicates the maximum power mixture, the second orange light, which is 13.2:1. Transitory enrichments should not, if the engine is warm (>200F Oil temp), go past the first red light. Readings at the far right side of the scale, the second red light, are simply too rich. Proper closed loop operation will cycle back and forth from green to orange around the center of the display.

It is simply the best way to evaluate the tune of your motorcycle and saves valuable dyno time. Mounted permanently. Waterproof.

Whether your bike is carb or efi this is the best way to tune...By riding and observing, not on a static dyno. Dynos are not exactly real world in terms of loads, airflow, or transitionals, and even if you had a million dollar AC Transient dyno room, you would still have to do real world testing. The gauges are dead accurate and are millisecond fast responding which makes it very simple to interpret or remember, even at a glance, while you are dodging cars watching for cops. We have a Superflow CycleDynwhich gives a better real world correlation than other dynamometers but we still evaluate air fuel ratios when riding.

Anyone who tells you optimizing tuning is easy is full of shit. Engineers at Ford say they spend two years just perfecting tip-in or initial throttle openings. Ride, observe,..then change or edit. Real world. 

Pretty soon Harleys will all be watercooled then you really won't be able to tell the difference between Milwaukee and Hammatsu. "The Man" will be sniffing your butt and planting microchips and gps modules up your ass so they can mail you a speeding ticket and keep track of your movements. They already have data recorders on your car so they know what you were doing when the biggie happened. Brave new world. Monitor your engine to get the most out of it before the NSA monitors your tail pipe.

 RSR AFR Gauge: Customer Comments

Customer writes: "When the gauge arrived I knew it would be of a very high quality, it has far surpassed my expectations. I was very eager to get this installed and take a look at my tune.  Amazing to see how little adjustments on the carb effect the AFR. As a result of this gauge, I have dropped one size on the low speed jet, raised the clip on notch and confirmed the main jet on my Mik48. Thank you, I really like this gauge. Ed"

"Just wanted to follow up with you. This AFR gauge is a game changer. I think the tune on this bike is just about perfect, or as perfect as a one can get with a carb. I have every needle, main and idle jet available for the Mik48 and think I used everyone of them chasing the tune. Now with everything dialed in, warm idle will flicker between the orange and red light, cruise is at the left orange light and hard acceleration toggles between last orange and first red. Plugs look terrific, bike starts first thing in the morning without any choke, while riding around town the lights are relatively stable, some moving around but not much. Again, I couldn’t be happier with how this gauge works. 

I am building a 124” TC to put into another FXR that I am building. This gauge is already on the build list, can’t imagine not having this gauge on any of my bikes.Thanks, Ed"


Customer writes: "First, I have had your LSR 2-1 C w/Turnout on my 98 FLSTS for about 4 years and 32,000 miles. It looks great, sounds great, and of course, performs great.

Second, the mechanic that works on my bike also drag races a Shovelhead powered FL. He only ran Thunderheader until he rode my bike and did some research. Steve had you guys make him a 2-1 and set new records in his class.

Third, my brother-n-law has a '05 EFI Road King. He was just dying to put some Rinehart true duals on it. I talked him into waiting until he looked at and listened to a lot of RKs before buying. During the year he did this I kept asking what he wanted out of the new exhaust. Finally, he admitted sound and performance. He kept saying I love the sound of your bike and it is fast as hell. So, I suggested the LSR 2-1 C Slash Cut longer pipe. We installed your exhaust, a PCIII usb, and a K&N filter with stock a/c cover and changed the backing plate. His road king has torque and runs like a scalded dog. We both can out run 95" kits installed at the HD dealers.

I provided the background to say this. My B'law took his RK to the HD dealer for the 15k maintenance service. The mechanics went nuts over the exhaust and what it does for the performance. They asked all kinds of questions. They had never heard of your firm or the exhausts. Now comes the kicker and it makes me a little sad (because I have enjoyed having an exhaust that out performs the crap the HD dealers sell). The mechanics conclusion. They are going to take off that HD exhaust crap (their words) and get RB Racing exhausts. Now the word will spread around Memphis and RB Racing exhausts will be everywhere.

It was good while it lasted - having the performance edge over others.

Your exhaust system has been great on my bike for 4 years and 32k miles. Thanks for a great product. I can't imagine having any other brand of exhaust!

PS. Sure wish you would make a LSR 2-1 for Victory Jackpot or 8 ball. The only reason I haven't purchased one in the last two years is because you said you would NOT make a Victory exhaust.


Shovel FL Bagger LSR 2-1 Systems

Ever since the price on Shovels went up from $3,000.00 to $10,000.00 or even past $15,000.00, Shovel owners have been asking us to build FL series LSR 2-1 systems. This design fits both solid and rubber mount models. Solid mount models have a laser cut bracket that mounts off the frame.

We heliarc on a slotted bracket hidden on the back side of the exhaust. The pipe is two piece with the front pipe slipping for ease of install and to account for variances in deck heights. You do not put a clamp on the slip joint as it is a slip joint and not meant to be crushed by some chromed clamp and an over-zealous 3/8" ratchet. Assemble the slip with Permatex 598B if you so choose. 

Newer Dual Coat Black Ceramic Finishes

We have a lot more people looking for durable ceramic finishes and we think we have the best finishes on the market. In the late 70's and early 80's we tried all sorts of coatings and paints and even used porcelain on some of our products in the late 1980's. The newer ceramic finishes are tougher and we use both Polished Silver, and Semi-Gloss Black, to complement our usual chrome offerings. The newest "Turbo" Black  finishes are a dual coat process that gives additional protection against scratches and nicks, providing two barriers against corrosion.

In more than 3 decades we have tried all sorts of black finishes: Kal Gard, VHT, Techline, and others. We also in the mid 1980's we even tried porcelain for awhile. It chipped and the heat distorted the parts. Most finishes will not survive over a long period unless they have a base coat to cushion rock strikes and scratches. The surface has to be perfectly prepared and most applications can fail if run too soon at elevated temperatures as they are typically baked at 450 to 500 deg F whereas the cure takes place at around 750 deg F. Lower temperatures will not cure the resins and they will fail once the bike is run. To get around this dilemma we have found the best solution is a 2500 Deg F Silver Ceramic cushion base coat and a secondary Black Semi-Gloss finish on top of this.

Dual Coat Black Ceramic finishes are therefore the most expensive as they involve a triple process. First the parts are polished to remove any tooling marks.Then the parts are zirconia media blasted to prepare the surface. Then parts are cleaned. The parts are base coated with a 2500 Deg F Silver ceramic and baked. The next day they are sprayed with Black Ceramic and baked for a third time.


On our Dual Coat Black Ceramic LSR 2-1 Exhaust Systems the heat shields and heat shield clamps are ceramic coated with 2000 Degree F satin black ceramic finishes. These finishes resist carb cleaners and other chemicals. Our Silver Ceramic LSR 2-1s use silver ceramic coated heat shield clamps.

Ease of Installation

All LSR 2-1's are constructed in a number of fashions depending on the style of pipe and the model they go on: On rigid mount applications we use a "two-piece" design for "B" and "C" styles. The rear primary tube, the collector, and the tail section are welded into one assembly, while the front primary is a separate piece that slides into a precision "upset" slip joint that is permanently welded into the collector right next to the rear primary tube. 

This two-piece design makes the pipe supremely easy to install and offers three additional benefits: (1) We get better chroming on the front tube; (2) The slip allows for minor variations in exhaust port heights; (3) The slip joint allows a tension-free final positioning of both the head pipes as well as the tail section in relation to the mounting bracket, thus reducing stress/vibration fractures. There is no cussing when you install an LSR 2-1! 


As they say. So simple a.....

Shovelheads: We provide a frame mounted laser cut and powder coated bracket for the rigid mount FLH Shovelheads and FX models. Other models like FXR Rubber're sort of on your own.

Bonneville Proven 

 LSR stands for Land Speed Record and that means only one place...The Bonneville Salt Flats, the Great White Dyno. We have the only gas powered street legal bikes over 200 mph and we're damn proud of it. RB Racing doesn't race typewriters, we race motorcycles and when someone says they get a 70% gain from their system, ask them for their 200mph Bonneville Records or any records for that matter. Hell, if we raced typewriters it sure would be a lot easier, not to mention cheaper.

We place an LSR tag on each exhaust system we make so they can be easily identified. Every now and then over the last twenty plus years someone decides to copy one of our designs, usually because some customer is very happy and he "stirs up the pond". They copy the general look but not the features that make them work. The tags eliminate any question about whether it's an RB Racing design or not and allows people admiring your bike to know the pipe's origin.

The tags have proven to be very popular and have been used since 1992. Every now and then someone asks us to not place the tag on their system to which we answer..."send us an affidavit certifying that you have removed all manufacturer logos from your tires, engraved Performance Machine logos from your brakes, Mikuni or S&S identifications from your castings, Harley identifications from your gas tank, Nike logos from your tennis shoes etc. and we'll consider it". The last guy we let talk us out of this was getting his bike in Hot Bike magazine and said he'd give us "credit" for a one off pipe we designed. When the magazine appeared on the newsstand all we saw was "computer designed pipe by Sands Racing". That was the end of that.

Crystal Balls and Astrology

You win some, you lose some. Mostly we win. Like we always say it always depends on the tuner. This is not a parts changing business and we all know it's easiest to just change pipes and see what happens, but that's not science. The LSR 2-1 pipes, themselves, do not represent a "limit" as long as you choose the right pipe for your application. The rest of the equation is getting the parts and tuning to work together.

Just put the damn thing on the road, open her up, and see what she'll do. Let the metal scream.

New Cloisonne Tags

Like in the adage "The relentless search for perfection" we have upgraded the logos we put on our LSR Exhaust Systems. Previous tags were stamped and formed aluminum with silk screened details. The new cloisonne tags are a precision die struck brass, nickel plated, with powdered glass fired in an oven then polished to a jewelry finish. These are direct replacements for our older tags and are available for US $25.00 postpaid via US Global Express (foreign) or Priority Mail (domestic US). They come with black headed rivets and are riveted in place with a light coat of high temperature silicone (Permatex 598B) behind the tag. 

O-Sensor Port Standard

All RB Racing LSR exhaust systems come standard with a machined and heliarced oxygen sensor boss just below your front exhaust port. This port is designed to accept and oxygen sensor (18mm x 1.5mm) which will allow you to use our RSR Air/Fuel Ratio Meter to tune and monitor in real-time your air/fuel ratio. 06-1025 Billet Bracket shown.

Single O2 meter for Carb models


For the past 20 years we have been putting O-Sensor ports in the front primary tube. It is the only way to set your carburetion for optimum performance and economy. Our RSR Air Fuel Ratio gauges are completely waterproof and Harley proof. Billet construction and dead accurate. Saves dyno expense. If you just can't stay away from Dynos then tune with this first in the real world, then go to the dyno. Shown here on a 2008 Sportster 


These days people have all sorts of expectations. They want to be loved. They want to be admired. They don't want their chrome to turn colors. They want "numbers". They want assurances. They want guarantees, warranties, trial periods, and return policies. They don't want the part, they just want everything that goes with their household baggage. It's all part of keeping everything nice and tidy and "best". Fear of rejection. Fear of making any decision.

We just come in and make the best parts we can and that's all there is to it. The rest of the equation is too complicated. There are plenty of people who will assure you till hell freezes over. We don't have time for this.

For those of you who do not understand that 1450 Deg F of exhaust flame front will discolor chrome don't order the parts, or just leave the bike on the trailer..or order the heat shields to cover up the underlying discoloration. Ceramic or chome the pipes get really hot and heat shields provide an air gap to protect and hide things.... Melted tennis shoes, burned pants. Air is the perfect insulator.

It isn't the old days anymore. People with $35,000.00 toys roll up in the screaming fetal position. Joy used to be a basket case that you could get running. Brave new world.


The agony of decision making can drive a poor consumer insane..."What is the best?"...".."How does it compare?"..."What will I get, what will I gain?"..."When can I get it?"..."Should I get a 2" or a 1 3/4" pipe".."Will the chrome blue?"..."Can I talk to someone who has one?"..."How long have you been in business"...""I've never heard of you"... "How black is the black?"..."Why haven't I seen these before?"..."My bike is at the builder and he has to have the pipe by Friday or I lose my slot!"..."Is the silver as shiny as chrome?"..."I have a wazoo998 cam and billet rocker boxes and a 280 rear tire...will your pipe work?"

Right brain, left brain. Fear of rejection. Fear of being different. Social standing. It's all too much for most people to deal with.

Look at the pictures, take the Red Pill, and start your journey. It's that simple.

Remove the Angst

If you wish avoid any decision and stay right where you are, just take the Blue Pill. If the journey for truth and power excites your spirit, take the Red Pill.

No Limp Dick Designs

Ever since Jesse James did his original Hell Bent pipes people have either copied them or tried to make whatever they were doing swoopy. If you are a slave to fashion then these might just suit your fancy. At RB Racing we build logical designs that work and leave the limp dick fashion trend to those who love to park and talk.