Hot News..Latest From RB Racing

M8 Softail 0-3" extended Chain Drive Swingarms

The new M8 Softails are making 170+ hp with our LSR 2-1 Pro Stock exhaust systems and are switching to chain drive. With only +/- 1/4" movement there is no real happy spot for chains figuring in chain stretch or changing final rear sprocket sizes.

Call for details and pricing for converting your swingarm for up to 3" of adjustment.

00-1306S Prototype

The 00-1306Sis the stainless version of our LSR 2-1 Pro Stock Challenge. We prototyped out this one in thick 16 gauge tubing to see what was involved beside the additional expense. This was for a M8 Softail for a Bonneville customer who was searching for 200hp...a bike that was not completed...big dreams, no execution.

We pre-chromed some of the hardware like our cnc machined venturis and the pipe rear mounting bracket.

00-1306RS Prototype

A 00-1306RS version with the resonator for decibel reduction. Same 2" primaries and 15 degree merge collector as other versions. Prototype.

Above is a 2020 M8 exhaust which is OEM stainless after less than a few months of use.

The issue with stainless is that it will turn gold, then brown, then blackish...Plus you cannot chrome it. Then there is the issue of the heat shields if also done in stainless.

It is also soft compared to heavy 16 gauge mild steel and is usually made out of thin-wall tubing....0.049" or less...or as we say "Oh too Thin Gauge"...typically 20 gauge .035".

We decided no stainless production except for our higher end racing turbos. Even these we will oxide blast, clean and apply a ceramic coat with Cerakote Glacier Forge C-8200. If left in raw stainless, they will discolor quickly at elevated temperatures...turning gold, brown, and blackish.

Indian Chief Pro Stock 00-1306R (Resonator)

Indian Chief owners are following the path of Harley owners...the never ending search for more power and dyno bragging rights. This exhaust was coated in dual coat black ceramic.

With new M8 Softails pushing 170-180+horsepower, Indian owners are searching for the best exhaust. Our 00-1306R exhausts have been proven to be the highest horsepower solution on the exhaust side of the equation...

They are a wide open Pro Stock 15 degree Merge collector design that has enough sound attenuation to be used on the street. No saddlebags with this one. Available in three versions of finish.

2020 M8 Softail Low Rider S  00-1306R (Resonator)

Customer writes: "I was very surprised by the sound level of the pipe. I have owned a LSR 2-1 00-1306 (no resonator) on a prepped Twin-Cam 110ci, and I must say this new pipe is incredibly quiet even though I run it on a 128cid with 11:1 compression. Dare I say too quiet ? ;-)

As I am used to LAF pipes, I was almost disappointed when firing the engine. But after a few miles running the bike I must say the sound level is just great.
Tone is very deep, and it will bark but won’t kill your drums when you open wide.

By the way, my neighbors thank you…

Performance-wise, the pipe seems really excellent, but I guess you need no feedback on this point !

I was aiming with this build 150-155HP. Engine is already shooting 170HP with a partial tune. Midrange torque is unbelievable.
Ill be back with more precise figures as the bike gets fully tuned.

Best Nicolas."

Update: And thanks for the new shield. Fitment is perfect.

128ci, 173Hp@5300, 194Ft.Lb@4300 (Engine figures), 30 tooth Belt Pulley.

Hang on! That ride is a blast !!!

Best Nicolas"

00-1306R systems are available for our fullproduct line...Sportsters, EVOs, Twin Cams and M8's. Full race, zero-restriction, with Db reduction.

Milwaukee 8 LSR 2-1 Black Hole Dyno...156Hp

Customer writes: "M8 LSR 2-1 Black Hole Exhaust with 124 Rick Ward heads and cam 64 mm throttle body SS 124 cylinder and pistons, big inj, and air cleaner. Perry"

00-1397 LSR 2-1 Black Hole Exhaust. This is our touring exhaust.

The same customer also has one of our Dresser turbos, a 200HP 95" motor. He says his M8 "Does not pull as hard as the turbo does".

Dual O2 Switchable

Bonneville Racer asked that we make the gauge switchable from his Bonneville racebike to his Dresser. The RSR Dual AFR Gauge has eight wires, two for the O2 sensors, and 6 for power, ground and two warning lights. We added a Deutsch 6 position DTM connector and supplied him with two secondary harnesses with matching 6 position DTM Connectors and Weatherpack O2 disconnects.

With the Bonneville Salt  Flats about gone we guess this may stay on his Dresser come next August. He races long course with a 120" Harley.

New 00-1306R Exhausts..Pure race with Db reduction

Pictured above is our LSR 2-1 Pro Stock 00-1306R for a Twin Cam Dresser.

Customers are making 180 or more horsepower and 200+ ft/lbs of torque with our LSR 2-1 Pro Stock systems...Which are wide open with no baffle.

We offer the new  "R" version with a 4" diameter, welded-on,
resonator tail section that has a straight 2.5" through by-pass.  This will knock some decibels off so you can be sort of socially acceptable.

Pictured above is a 00-1306R for a 2020 Milwaukee 8 Low Rider S with mid pegs.

Picture above is a 00-1306R for an early (Pre 2006) Twin Cam Dyna going on a 124" engine build. This exhaust will be delivered with chrome heat shields: Front, rear and collector.

Note: All "00-1306 Pro Stock Challenge" models do not have any baffle as inserting anything into the 2.5" tail section will hurt performance. The 00-1306R model should be ordered for a noise Db reduction with no hindrance in performance. The I.D. remains 2.5".

The resonator section can be in stainless as pictured above or in the Ceramic Silver or Dual Coat Ceramic Black....In picture above the straw-colored stainless Resonator is as it comes out of the 600F oven for the third time during the Dual Coat Black Ceramic process.

All 00-1306R systems are only available in ceramic and not in chrome finishes. The three optional heat shields (f / r / collector) can be in chrome,  or in black ceramic.

Turbo FXR Orca Swingarm

Pictured above is our FXR Turbo Orca swingarm with 1" higher shock mounts. It has 2" of adjustment for the chain drive and uses a 25mm late model axle for a 17" Dyna rear wheel. The 2008 Swingarm has been modified to use our 5/8" 1999 FXR CVO2 transmission pivot shaft. A late model 4 piston CVO Dresser caliper provides the rear stopping power.


We are using a 1998 Dresser oil bag 5 speed transmission with Jims Fat5 gears. We also added a secondary gas tank where the original oil bag went.

We raised the shock mounts 1" to use with 13.5" shocks (same as running a 14.5" Shock) to get 6.00" of lower frame ground clearance with the smaller diameter 150 x 60-17 rear tire. We are also using stock narrowglide 39mm fork tubes with a 17" Buell front wheel (110/70ZR17) with the original 3/4"axle. We get an improved swingarm downward angle of 6 degrees as an additional benefit.

Sitting on its wheels the bike has 28 degrees of rake.

Annealed Copper Turbo Gaskets

Cherry Red with torch then drop in cold water. Turns copper into a soft condition. We anneal all our turbo and wastegate gaskets. No goo or silicone.

John Stein's 5 Year Labor of Love

John Stein sent us his new documentary ""Quarter Milestones: A History of Motorcycle Drag Racing", a one hour journey from the early days of street racing in the post WW2 era to present day. John knew that many of the early pioneers had either passed away or, if still kicking, he needed to get the interviews and the back stories documented before it was too late. John went on a five year journey all over the country to interview the racers, tuners, fabricators and event organizers to nail down their exploits before it all disappeared into the ether.

The fire in their souls, the innovation, the creativity, and the fierce determination is all in full view in John's documentary. It's a period in time that cannot be duplicated which is fully explained by drag racing legend Terry Vance and master fabricator Sandy Kosman. If you are old enough to have seen the Barn Job run or the doubles, triples and Russ Collin's V8 Sorcerer you have to have this film.

Here photographed on a copper-topped TIG welding table where go fast parts are still made from scratch.

Order your copy from John at Gearhead Publishing and follow John Stein on Facebook.

We use Genuine Garrett Ceramic Ball Bearing Turbos in our Harley-Davidson Turbo kits. Every turbo gets modified with additional machining, welding, deburring, polishing, and ceramic coating. All of the hardware is replaced with stainless steel fasteners.

It takes many hours to prepare these for shipment. Turbos are shipped with correct positioning for installation with all fasteners installed in their correct orientation.

Turbos are welded, machined, and blasted prior to ceramic coating. At 8-9 PSI of boost these deliver 165 rear wheel hp on a 95” motor and 200 rear wheel hp at 12 PSI of boost. Larger motors will produce higher figures. The turbos are capable of 25 PSI of boost, adjustable when riding, but we suggest you use common sense as 165 rear wheel HP is the same as a 143” motor and comes on sooner.

As a final step we ceramic coat both the inside and outside of the turbo and compressor housings. We once drove a turbo bike from LA to Bonneville and back and drove around on the salt flats for all of SpeedWeek. On the return to LA we let the bike sit in the shop for about six months then tore it down for upgrades and refinishing. We found the salt air had corroded the inside of the housings to the point the exhaust turbine was touching the corrosion in the iron housing.

The turbo was fine...We just blasted the corrosion off and ceramic coated the insides and outsides. We do this to all turbos we sell.

00-1306 M-8 Nitro Pro Stock Challenge

We make a 00-1306 Pro Stock Challenge LSR 2-1 "Nitro" exhaust with a "Kick"  to keep the exhaust off of the M-8 Dressers saddle bag. All the new M-8 models have better cornering clearance and we tucked this "Nitro" Challenge design up where it cannot drag and made it exhaust away from the right side bag.

No baffle. Full race. Available with 12mm and, if specified, two additional 18mm oxygen sensor bosses (no charge). Standard is two 12mm bosses for the OEM 12mm sensors.

15 Degree Merge collector. Two inch primaries. Billet flanges and clips, billet gaskets and three heat shields. This exhaust is going full Dual Coat Black Ceramic, both exhaust and shields which is the most popular choice.

Turbo Changes...28 Years


Here is our 56mm throttle body for our RSR EFI Turbo set up. It is configured with two (2) 650cc Bosch EV6 (12 Ohm) Injectors in a 2 Bar (15 PSI Boost) system destined for an 80" EVO motor that we pre-programmed for 195hp @15 PSI.

We are phasing out our RSR Fuel Injection systems after 28 years. After existing RSR EFI Turbo orders are satisfied and will be transitioning to Bosch Motorsports 60mm Fly-By-Wire electronic throttle bodies and Cosworth Pectel SQ6 and SQ6M electronics for our Turbo Evo ORCA Motors. Our Intercooled Turbo Kits for oem Harley Twin Cam Delphi systems remain unchanged .  Take a look at the above. We did not show all the parts...take a guess how much time is tied up in this stuff.

All of this is made from, as they say, "scratch"...Lots of records, lots of miles...lots of stories. 28 years ago there were no closed loop turbos...except at RB Racing. 200 mph Harleys, BMWs, Suzukis, Triumphs, Kawasakis....way before anyone else. Things do not sit still. Time to move on. Life gets even more complicated and more expensive.

TTS & Exhaust Combo Military Discount


We offer a combined 10% discount to active or prior service both US Military and the Coast Guard on LSR 2-1 exhaust purchases with TTS Tuners and Cable Kits.

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.

00-1007 LSR 2-1 B Style Slash Cut. Stock 4 speed, electric start. Not certified for 5/6 speed conversions.

Indian Owners Happy with New LSR 2-1 Pro Stock Spyder Systems...111 / 116"

Customer writes: "Here is a pic of my 2017 Indian Chieftain Elite with the RB racing pipe. This bike has the 116 kit and is a blast to ride. In 25 years racing drag bikes, this is by far the best sounding bike I’ve owned. Love the pipe!! Thank you RB racing ..... Don". 00-1400 on a 116".

Customer writes: " Please find attached a picture of my bike with your Exhaust system as promised. I absolutely love the new Exhaust. I used to have the Freedom/Rinehart true dual exhaust and I liked it very much but the RB Racing LSR 2-1 is just so much better when it comes to the performance and the sound.

Thanks again for your service and support, I appreciate it very much.

p.s. I have the 116" Indian kit, Vic Baggers VP60 intake and the Dyno Jet PVCX with a custom map.
On the Dyno, it puts out around 112HP and 134 Torque. Iwan". 00-1399 on a 116".

Note: We spent about 3-4 months doing and redoing these until we were happy with them. Then, once you start shipping the first group of parts, you never know what may come up. We made a few more changes based on customer feedback and the systems seem to be well received. All this takes time. The goal was to build a full race system with sound attenuation and to focus on torque, and a reduction in weight and heat.

Dual RSR Air Fuel Ratio Gauge: Indian Chief (12mm) O2 Sensors


Kits for Open-Loop or Closed-Loop reflash.

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.

 Coat Black Ceramic Finish

The Dual Coat Black Ceramic is shown here after we media blast the top Black Ceramic Coat off with #100 Oxide leaving the base Silver Ceramic Coat exposed. Holding the blast gun at one spot for a longer period exposes the bare metal underneath.

The Dual Coating process is expensive and takes several days with three trips to the oven. Once to clean the exhaust, once to bake on the Silver Ceramic at 600 Deg F and a third time to bake on the Black Ceramic Finish at 600 Deg F. It's the only way a Black Ceramic Finish will hold up to chemicals and corrosion. We have years of experience with this process.

Serialization of Your RB Racing LSR 2-1 Order.


We use 2000 Degree F Ceramic coatings on our heat shield hose clamps for our Dual Coat Black LSR 2-1 exhaust systems. It makes the clamps "disappear" and they will not discolor.

We also heli-braze metal tabs inside our heat shields that are stamped for the part number and your order number. The three digit number is the part number...All LSR 2-1 exhausts are 00-1XXX, with the last three digits indicating the part number. The alphanumeric four digit number is your order number. The exhaust, as well as the the heat shields, also has all seven digits stamped into it. The "blank" tab is a spacer only and does not use a hose clamp.

We maintain a database on all exhausts sold so we know when the exhaust was sold, who ordered it, and any and all details concerning the order.

Turbo System with RSR EFI

One of the last of our RSR Closed Loop EFi Systems we will be shipping. We started this closed loop efi intercooled turbo stuff back in 1989 and set all sorts of speed records and won drag racing championships..All pretty much on our predictive programming with very little input from the customers. Our RSR EFi systems went on bikes that were carbureted or scratch built race bikes. We were way,way, ahead of the curve.

Packed into two heavy duty boxes with laptop compter and all hardware for overseas shipment ...90 lbs.

The last 4 years we have been testing and racing with high-end Cosworth Pectel SQ6M electronics at Bonneville.  These systems have a very steep learning curve with over 8800 programmable functions and tens of thousands of entries. Since few of our customers understood our EFi, which was dead simple, even when we wrote the programs for them, going to a more sophisticated system will be interesting. These will only be going on scratch built bikes with Single Cam EVO Orca motors or 32-2 Crank Triggered motors with no OEM electronics. Complete control of all functions in one black box.

We have turbo systems for the OEM EFi Harleys 1999 to present.

14 More Milwaukee-8 Acronyms

Street Bob: FXBB [107]
Low Rider: FXLR [107]
Softail Slim: FLSL [107] Floor Boards
Fat Bob: FXFB [107] / FXFBS [114]
Deluxe: FLDE [107] Floor Boards
Sport Glide: FLSB [107] Has Saddle Bags
Fat Boy: FLFB [107] / FLBS [114] Floor Boards
Heritage Classic: FLHC [107]/FLHCS [114] Bags; Floor Boards
Breakout: FXBR [107] / FXBRS [114]FXBB
Power Cruiser:  FXDR [114]

Add these 14 new bits of alphabet soup to your memory bank to impress your fellow riders.

These new Softail models have different exhausts than do the  M-8 Dressers and have no relation to the EVO or Twin Cam Softails. M-8 Engines are taller, the ports further apart, and whereas the M-8 Dressers are rubber mounted, the new Softails are not. We have specialized exhausts for all the M-8 Softail models including newest the M-8 Sport Glide (bags).

Please note we have two different designs for the M8 Softails...One for Forward Control and one for Mid Peg models.

Forward Control Models: FLSL, FXFB/S , FLDE, FLSB, FLFB, FLHC/S, FXBR/S, FXDR
Mid Control Models: FXLRS; FXBB; FXLR

The above pipe is for a M-8 Dresser. The pipe is made in three pieces with two slip joints (no clamps!) for the rubber-mounted Dressers.  Dressers use a three point transmission mount. On the LSR 2-1 Black Holes and LSR 2-1 Pro Stock Spyder Systems there is an additional rear bag mount.

The M-8 Softails (all nine models) are two piece systems as the engines are rigid mounted. All RB Racing M8 exhausts use 2" primaries.

New LSR 2-1 M-8 Turn Outs and Slash Cuts:  New Part Numbers and Prices  . Pictured above is a M-8 Dresser exhaust temporarily installed on a M-8 Softail. Turn Out Rotated over 45 degrees. One of our dealers wanted to get ahead of the tuning curve on the new Softail FLSB so we sent them the above Dresser pipe so they could do some tuning... 107 hp and 124 ft/lbs of torque.

The FLSB required a different exhaust that we did not have ready at the time as the FLSB had just come out. We now have specific exhausts for The M-8 Softails...for our full product range, including the FLSB.

Shown above is the 00-1306 LSR 2-1 Pro Stock Challenge on the 2018 FLSB. M-8 Softail pipes do not use the same rear primary tube design as our M-8 Dresser exhaust systems. Softail pipes are frame mounted. No oem bracketry is used.

Milwaukee 8 Softail FLSB  00-1406 Slash Cut in Dual Coat Black Ceramic pictured above. No bag or ground clearance issues.

New Milwaukee 8 Softail Mounts for LSR 2-1 exhausts. We have mounts made up for the full range of LSR 2-1 Exhausts: Pro Stock, Pro Stock Challenge, LSR Turn Outs and Slash Cuts, Pro Stock Spyders and Black Hole Designs. If you add OEM FLHC or FLSB Saddle Bags to other M8 Softails we have an additional mount kit for these.

New M-8 Softails are available in our full product range. Prices on our Part Numbers Page.

00-1405:  LSR 2-1 Turn Out (Specify Out or 45 Degree Rotation)
00-1406:  LSR 2-1 Slash Cut (Specify Slash Out or Down)
00-1407:  LSR 2-1 Slash Cut +5" (Specify Slash Out or Down)
00-1408:  LSR 2-1 Pro Stock 
00-1306:  LSR 2-1 Pro Stock Challenge
00-1409:  LSR 2-1 Black Hole
00-1410:  LSR 2-1 Pro Stock Spyder

All have Milwaukee 8 Softail systems have 2 Primary Tubes with 12mm Oxygen Sensor ports. Special Order with 18mm Oxygen Sensor Ports.

We supply Laser Cut powder coated Mounting Brackets for both Saddlebag and Non-saddlebag models. 

Note: Heat shields can be in any of three finishes and are ordered separately

No stock OEM exhaust mounts are used. Billet Flanges and clips, Billet Gaskets and extra mil-spec exhaust nuts are required.

165HP @ 9 PSI Boost; 200HP @ 13 PSI Boost... 95 Cubic Inches


Torque is the game..Take it to 4 or five psi of boost, short shift, and do it again...80 mph instantly. Or, if the handlebar adjustable boost control knob is set at 9 PSI, get 165 hp now. 13 PSI 200 hp. Turbo goes to 25 PSI. Torque allows you to effortlessly roll-on and pass that line of Semis, or leave the other bikes behind. RB Racing Turbos.

Perry on his 95" Twin Cam with his OEM Delphi controller reprogrammed with RB Racing's 236hp Injectors (9 gram/sec).

New Indian Chief LSR 2-1 Pro Stock Exhausts

New Indian Chief LSR 2-1 Pro Stock Exhaust Systems.

The Indian Chief is a "from the ground up" interpretation of the classical V-Twin, kept alive for over 100 years by Harley-Davidson, the sole survivor. In 111 or 116 cubic inch formats it's short on horsepower and long on clean sheet engineering. Indians are here to stay this time around after several aborted attempts to revive the marque.

Beautiful paint and chrome and true "Indian Heritage" styling it's a more modern interpretation of the classical V-Twin...This time around with three camshafts and some pushrods as straight as an Indian's arrow .

The OEM exhaust has little in the way of performance tuning. We've got that covered with a pure merge collector LSR 2-1 design. Maximum benefit with Stage 1/2/3 and larger throttle body (60mm) modifications past 130 horsepower.

Prices are on our Part Number Price Page. We build to order. Payment at time of shipment. Dual Coat Black Ceramic or Silver Ceramic with a choice of black or chrome heat shields

Bosch Motorsport Ignition Coils


These are the Bosch Motorsport Ignition Coils that we use in our dual-plugged Turbo ORCA motors. We stock these along with the specialzed connectors. ORCA motors use two 12mm racing spark plugs per cylinder for bore sizes 4.000" to 4.375". We trigger these with a Cosworth Pectel SQ6M ECU, programming four separate spark maps, each with 25 x 25 sites, for a total of 2500 ignition points. In terms of keystrokes to enter this data...a bit shy of 12,500 keystrokes. No one said this was going to be easy. We use Champion 662 / A59C resistor racing spark plugs, which we also stock.

New RSR Wideband (Bosch LSU4.2/9) AFR Gauges

RSR Dual Air Fuel Gauges for the 18mm Bosch LSU Wideband Sensors (20:1 to 10:1 AFR) are in production. IP67 waterproof in billet enclosures these have our 10 L.E.D. interface that tells you at a glance if your AFR is Stoichiometry (14.56:1) or peak power ratios of 13.5:1 or 12.5:1...and ratios of 11.5:1 or richer.

You cannot divert your attention to watch a digital gauge and try to read, or remember, spooling numbers. You need hysterisis at a target ratio that can be interpreted at a glance whether you are dodging cars, or going 200 mph. We just provide the AFR Gauge, not the Bosch Lambda sensors.

The white arrow indicates maximum torque and power. Easy to see at a glance at full throttle.

 Left to right 10 L.E.Ds going from lean to rich: Five Green lights, Two Yellow lights, Two Orange lights and one Red light. These display the range 20.5:1 to 11.5:1

The two Yellow lights L-R are 15.5:1 and 14.5:1 (Stoichiometry)
The two Orange lights L-R are 13.5:1 and 12.5:1 (Maximum torque and power)
The Red light is 11.5:1

Part Number 06-1026. PDF Instructions.   $295.00

I was sleeping in Class


Running from the man...Panheads forever. Who the hell cares about laws anyway? You're an outlaw and laws regarding sines and cosines just don't figure into the picture. Well, get out your tape measure and enter some numbers. Stay away from the chalkboards and that money you were going to pay your rent with is better spent on a new set of tires. The road beckons.

RB Racing offers over 40 free online calculators to figure out all sorts of things like rake and trail, compression ratio, camshaft data, boost, airflow and horsepower requirements and many others. All free online at click on the "Calculations" link above.

236hp and 328 hp Injectors

RB Racing Bosch High Impedance Injectors rated at 236 hp or 328 hp at a duty cycle of 80%.  Used in our Harley Turbo Kits and in big inch motors. Direct insertion into stock fuel rail/throttle body. Two or 3 Bar Map Sensors required with Delphi or aftermarket ECMs.

9.3 Gram Injectors (236 hp @80% Duty Cycle): Come with 20 gauge 22759/32 Mil-Spec Wiring Pigtails. $295.00 (pair). 03-1014. In stock shipping.

12.9 Gram Injectors (328 hp @ 80% Duty Cycle): Come with 20 gauge 22759/32 Mil-Spec Wiring Pigtails. $395.00 (pair). 03-1015. In stock shipping.

Real World Tuning Package...While you ride..Not on the Dyno

When you order a complete LSR 2-1 exhaust with the RSR Dual Air Fuel Ratio Gauge and The TTS MasterTune there is a $75.00 discount on the total price. You can observe while you ride in the real world to evaluate transitionals and wide open throttle. The RSR Dual Air Fuel Ratio Gauge is waterproof and Harley-proof. It gives instantaneous visual information that is available at a quick glance...No numbers, just position and color reference (GGGYYYOORR), to tell you if your mixture is correct. Invaluable for wide-open runs through the gears or evaluating transitionals on your roll-ons.

The above chart gives the response times of the 2009 and later 12mm Delphi Oxygen sensors. In actual dyno tuning you really have to hold one "site", i.e. the intersect of load and rpm to get an accurate feedback as the sensors are always "behind" due to their response times. That's why you see Superflow engine dynos doing step testing so things can stabilize. In a tenth of a second you could be at any location on the fuel map...Not to mention the eight surrounding sites that are being interpolated.

The problem with "holding things" on and eddy current dyno is that is things heat up in these air cooled engines and the hidden code in the Delphi ecm starts changing things. You can really only do one wide-open throtte pull on a dyno at one rpm and load site before the engine heats up too much.

Best do real world data recording with the TTS while you ride and then evaluate, in real time, your map with the RSR  milli-second fast RSR Fuel Ratio Gauge with genuine 18mm Bosch O-Sensors. Real time monitoring when you ride is the only way you can evaluate transitionals, acceleration additives, and wide open throttle...all in the real world moving through the air and on the road like you do normally. All LSR 2-1 exhausts can be ordered with both 12mm and 18 mm O2 sensor bungs.

Milwaukee 8

People kept asking about RB Racing releasing LSR 2-1 exhaust systems for the new Harley Motor. Well, we are fixtured for them with some new muffler designs that take into account the increased compression and displacement. No matter what people say, this is an emissions-designed engine with a lot of compression, locked in place valve adjustment and camshafts that are simply going to give you next to zero in gains for your hard earned money in just changing the exhaust. Every exhaust manufacturer wants your $$$ before things are settled down. We don't.

We released them when there were real gains to be made. 00-1306R is the newest addition.

Testing has shown cam changes need to be made along with a 2-1 exhaust to make any appreciable gains. Go ahead buy your $500.00 air cleaners and your $700.00 Monster Slip-Ons...keep the economy going. Dealer level cam modifications with CNC ported heads are showing about 130 hp...about where the TC 120R motors were.

It's still an air-cooled 45 degree V-Twin no matter what they say about water or oil cooling. BTUs are BTUs...It just has less flexibility in terms of modification than EVOs or Twin Cams at this time.  Another expensive puzzle. Does have more torque than before with the compression. A bigger, heavier, chunk of aluminum and steel.

People tend to forget these are heavy couches. Adding weight is a no-no. One of our M-8 test bikes came in with a V&H Duals that, when we removed them, weighed 41 pounds!! Our M-8 exhaust weights far less than Half of that and the Pro Stocks 1/3 of that. Power to weight ratio. Heavy couches.

The Milwaukee-8 is a taller, heavier engine with the O2 sensors moved upstream, closer to where they should have been. Earlier LSR 2-1 designs will not fit this motor. We supply a different saddlebag mount system for our under the bag designs like the Pro Stock Spyder and Black Hole. All systems also have a three point laser-cut mount off of the transmission.

00-1396 LSR 2-1 Pro Stock Spyder exhaust with 2" primaries and four heat shields.above.

All of our M-8 exhausts should be compatible with Harley's 2017 Cool Flow Fan. Hot puppies these are.

Milwaukee-8 LSR 2-1's for Dressers in production

Milwaukee-8 exhaust LSR 2-1, 00-1306 Pro Stock Challenge in 2".  Coated in Dual-Coat Black Ceramic for a customer who wanted a "Really loud racing exhaust". At the dealer level cnc ported heads, cams and bigger bore kits are up to about 130 hp. When you consider an 80" EVO was about 58 HP with 175 to 200F oil temperatures it's no wonder these run closing in on 300F hot.

Milwaukee 8 Exhausts: 12mm and 18mm O2 Sensor Ports Standard

All LSR 2-1 Milwaukee 8 Exhausts come standard with both 12mm and 18mm O2 ports. This gives customers the choice to run either the OEM 12mm or 18mm O2 ports (or both with our RSR Air Dual Fuel Ratio Gauges) and tune with various narrowband or wideband options on the market. Screamin' Eagle Smart Tune PRO Automatic Tuning Module shown above. RSR Wideband Dual O2 Air Fuel Ratio Meters are used wuth the Bosch LSU4.2/9 Wideband sensors.

We have also created additional LSR 2-1 designs:  00-1393, 2" LSR 2-1 Turn Outs;  00-1394, 2" LSR 2-1 Slash Cuts; 00-1395, 2"LSR 2-1 +5" Slash Cuts; 00-1396, 2" LSR 2-1 Pro Stock Spyders; 00-1397, 2" LSR 2-1 Black Holes; and 00-1398 2" LSR 2-1 Pro Stock Systems.

Most orders are for Dual-Coat Black Ceramic. Chrome and Silver Ceramic finishes can also be ordered. All M-8 exhausts come with both 12mm and 18mm O2 Ports standard.

00-1393 in stock 45 degree 2" Turn Out in Chrome/Chrome Shields
00-1393 in stock 45 degree 2" Turn Out in Dual Coat Black Ceramic/Black Shields
00-1395 in stock +5" Slash Cut 2" in Dual Coat Black Black Ceramic/Black Shields
00-1397 in stock LSR 2-1 Black Hole 2" in Dual Coat Black Ceramic/Black Shields

No More Dynas.... Hello 14 New 2018 Softail Models

Bye Bye Dya...Adios the wannabe FXR. Hello monoshocks that handle and are lighter with the M-8 Engine. Dyna as well as Softail names have been preserved to smooth egos.

We are gearing up for these with our full product line from Pure Racing LSR 2-1 Turn Outs and Slash Cuts to our LSR 2-1 Pro Stocks as well as our sophisticated LSR-1 Black Hole and LSR 2-1 Pro Stock Spyder designs.

These big M-8 engines love our 2" primaries. M-8's are now out to 117" in CVO models.

Something like our Bol D'Or Monoshock frames from 40 years ago. Triangles and stiffness never go out of style.

Exhausts in progress for:

2018 Softails: Mid peg Models; Street Bob, Low Rider
2018 Softails: Floorboard Models; Softail Slim, Fat Boy, Softail Deluxe, Heritage Classic
2018 Softails: Forward Controls; Fat Bob, Breakout

Turbo Kits Shipping

This RB Racing Turbo kit is for a 2003 Twin Cam Dresser headed for a customer  who intends to run 8 psi on his stock TC88 motor. There is a lot of custom fabrication and machining in these. The large intercooler keeps inlet temperatures close to ambient. RSR Dual Air Fuel Ratio Gauge, TTS MasterTune and injector / throttle body upgrades. Kits ship with rider adjustable boost 5 to 25 psi.

How much horsepower?...Well,  at low boost (9 psi) 165 hp and 164 ft lns torque on a 95" Twin Cam.You can go as high as 25 psi.

One turbo kit: Three double wall boxes with all parts individually packaged. 76 pounds off to a customer.

Turbo Fuel Control

This sure does get complicated since we've been at it for way over 30 years....From draw through SU carburetors in 1980, to blow-though carburetion, to making our own closed loop RSR Fuel Injection to advanced Pectel-Cosworth electronics as well as adapting to the ever-changing Harley OEM efi systems.  We have a number of options these days...It all depends on the year of the bike. Injectors to cover from 236 to 328 hp @ 80% Duty Cycle.