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...

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...

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...

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...

The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externally In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering - moving the muffler closer...

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...

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...

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...

The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externally In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering - moving the muffler closer...

The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externally Shorter overall length that is less susceptible to crash damage and complementary to FMF's Factory Forward Engineering - moving the muffler closer to the motor to centralize...

The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externally In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering - moving the muffler closer...

Incorporates FMF Resonance Chamber Technology™ both internally and externally 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 mass Constructed from only aerospace grade...

Product Info: FMF EXTREME and since 1973 have been about pushing the boundaries inside of the FMF Factory and the gnarliest of trails. The all new Titanium PowerCore 2.1 EXTREME was developed around Extreme riders such as Cody Webb, Graham...

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...

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...

The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externally In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering - moving the muffler closer...

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...

The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externally Shorter overall length that is less susceptible to crash damage and complementary to FMF's Factory Forward Engineering - moving the muffler closer to the motor to centralize...

EXHAUST PIPE FMF's Fatty Gold Series pipe broadens the powerband and provides a healthy power increase everywhere Improved throttle response, a linear powerband and enhanced over-rev all add up to a pipe that everyone will benefit from If you’re riding...

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...

The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externally In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering - moving the muffler closer...

FMF FACTORY FATTY EXPANSION CHAMBERExtra strong sheet steelUntreated surfaceFull soundBetter power deliveryCombination with FMF silencer recommended Product Info:  Our stock photos shown are of the actual item. Brand new directly from FMF in original packaging. IN STOCK AND READY TO...

The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externally Shorter overall length that is less susceptible to crash damage and complementary to FMF's Factory Forward Engineering - moving the muffler closer to the motor to centralize...