Factory 4.1 RCT incorporates the FMF Resonance Chamber Technology™ both internally and externally Achieves a shorter overall length that is less susceptible to crash damage and complementary to Factory Forward Engineering, moving the muffler closer to the motor to centralize...

ALL NEW INCORPORATING THE LATEST IN RESONANCE CHAMBER TECHNOLOGY PATENTED CORE SHAPE LOWERS SOUND LEVEL WHILE MAINTAINING MAXIMUM POWER OUTPUT PATENTED CANISTER SHAPE INCREASES INTERNAL VOLUME FOR MORE SOUND ABSORBING MATERIAL PATENTED CHAMBER DESIGN TO ENHANCE AND REFINE EXHAUST PRESSURE...

The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams and it shares many of the same characteristics with its craftsmanship and material quality Broadens and smooths out the power curve while boosting gains...

FMF FATTY FACTORY PIPE The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams and it shares many of the same characteristics with its craftsmanship and material quality Broadens and smooths out the power...

FMF FATTY GOLD PIPE Computer designed and dyno tested to make power gains where each machine needs them the most Tru-Flo stamping process ensures a perfect fit and optimum performance Constructed of strong 19-gauge steel with a nickel-plated finish FMF...

FMF FACTORY FATTY EXPANSION CHAMBERExtra strong sheet steelUntreated surfaceHigher maximum powerHigher speedFull soundBetter power deliveryUncompromising race lookCombination with FMF silencer recommended Silencer housing made of high-grade titanium Blue anodized outer sleeve Rich sound Low noise level Easy to mount Perfect...

FMF FATTY PIPE ALL PIPES ARE ELECTRO-NICKEL PLATED FOR A NON-CHIP FINISH THAT WILL NOT DISCOLOR EXCEPT THE FACTORY PIPE WHICH HAS HAND POUNDED WELDS AND NO COATING— JUST LIKE THE WORKS BIKES AVAILABLE IN FATTY FOR AN ALL-AROUND POWER...

NOTE: This muffler has a USFS approved spark arrestor TURBINECORE 2 SILENCER Our best selling Turbinecore 2 uses the exclusive "Turbine Dampening System". This top-notch product has well earned its U.S. Forest legal status. The straight through design of the spark arrestor...

FMF POWERCORE 2 SILENCERSpecially developed for use in motocrossSilencer housing made of high-grade aluminumStainless steel silencer capRich soundPermanently welded bracketsEasy to mountReduced weightFor a system with optimized performance and perfect balance we recommend the combination with the FMF Fatty expansion...

FMF POWERCORE 2 SILENCERSpecially developed for use in motocrossSilencer housing made of high-grade aluminumStainless steel silencer capRich soundPermanently welded bracketsEasy to mountReduced weightFor a system with optimized performance and perfect balance we recommend the combination with the FMF Fatty expansion...

FACTORY PERFORMANCE KITGreater performance due to special engine mappingBetter power deliveryDesigned to get the best performance from the motorcycle- Includes a pre-assembled factory cylinder with a special port finishing.INLCUDES ALSOFMF FACTORY FATTY EXPANSION CHAMBERExtra strong sheet steelUntreated surfaceHigher maximum powerHigher speedFull...

Gold Series Fatty™ Pipe Computer designed and dyno tested to make power gains where each machine needs them the most Tru-Flo stamping process ensures a perfect fit and optimum performance Constructed of strong 19-gauge steel with a nickel-plated finish Powercore...

Gold Series Fatty™ Pipe Computer designed and dyno tested to make power gains where each machine needs them the most Tru-Flo stamping process ensures a perfect fit and optimum performance Constructed of strong 19-gauge steel with a nickel-plated finish Powercore...

Description: P3 Carbon Fiber Composite 4-Stroke Head Pipe Guard/Heat Shields are a must for any 4-Stroke rider. This product serves three purposes. 1) The Heat Shield keeps your expensive riding pants and boots protected from super heated exhaust pipes. 2)...

Product Info: The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many of the same characteristics with its’ craftsmanship and material quality. The Factory Fatty broadens and smoothes out the power...

Gold Series Fatty™ Pipe Computer designed and dyno tested to make power gains where each machine needs them the most Tru-Flo stamping process ensures a perfect fit and optimum performance Constructed of strong 19-gauge steel with a nickel-plated finish Powercore...

Gold Series Fatty™ Pipe Computer designed and dyno tested to make power gains where each machine needs them the most Tru-Flo stamping process ensures a perfect fit and optimum performance Constructed of strong 19-gauge steel with a nickel-plated finish Powercore...

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire...

GOLD SERIES™ Pipe Computer designed and dyno tested to make power gains where each machine needs them the most Tru-Flo stamping process ensures a perfect fit and optimum performance Constructed of strong 19-gauge steel with a nickel-plated finish Powercore 2...

GOLD SERIES™ Pipe Computer designed and dyno tested to make power gains where each machine needs them the most Tru-Flo stamping process ensures a perfect fit and optimum performance Constructed of strong 19-gauge steel with a nickel-plated finish Powercore 2...

FACTORY Fatty™ Pipe The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams and it shares many of the same characteristics with its craftsmanship and material quality Broadens and smooths out the power curve...

Gold Series Fatty™ Pipe Computer designed and dyno tested to make power gains where each machine needs them the most Tru-Flo stamping process ensures a perfect fit and optimum performance Constructed of strong 19-gauge steel with a nickel-plated finish Powercore...

Factory Fatty Rev Pipe Pipe focuses its power delivery in the middle and upper RPM of the power band If you're running out of power up top, want more time between shifts and do a lot of deep berm or...

Constructed from only aerospace grade materials that meet exacting specifications Massive power gains throughout the RPM range RTS (Rapid Tuning System) Huge weight savings Manufactured 100% at the Southern California factory For closed course competition use only. End Cap Color/Finish...