Dirt Bike Mufflers

FMF Racing Factory 4.1 RCT Aluminum Slip-On - 044464

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward...

FMF Racing WR450F 20 Powercore 4 Hex Muffler - 044462

The PowerCore 4 was developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is useable and compatible with every style of riding. Aluminum construction and stainless steel Hi-Flo end...

FMF Racing Yamaha YZ450F 20-22/YZ450FX 19-23 Titanium Megabomb Header w/Mid Pipe - 044459

The ultimate power boost, the MegaBomb Headers improve performance along the bottom and mid-range powerband. Patented FMF technology combines the benefits of a longer header, with top end peformance of a shorter header.This Part...

FMF Racing Yamaha YZ450F 20-22/YZ450FX 19-23 SS Megabomb Header w/Mid Pipe - 044458

The ultimate power boost, the MegaBomb Headers improve performance along the bottom and mid-range powerband. Patented FMF technology combines the benefits of a longer header, with top end peformance of a shorter header.This Part...

FMF Racing Yamaha YZ250F/FX 19-24 Anodized Titanium Factory 4.1 RCT Full System w/Carbon Cap - 044457

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward...

FMF Racing Yamaha YZ250F 19-25/YZ250FX 20-25 AL F 4.1 RCT R. Carbon Cap Comp Sys w/ SS MB Header/MID - 044456

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward...

FMF Racing Anodized Titanium Factory 4.1 RCT Muffler w/Carbon Cap - 044455

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward...

FMF Racing SS Aluminum Factory 4.1 RCT Muffler Carbon Cap - 044453

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward...

FMF Racing Hex Q4 S/A Muffler - 044452

Developed over years of championship offroad racing. Max sound output 96dB; most models below 94dB. Use with stock or FMF header. Constructed from aircraft-grade aluminum and high-strength stainless steel.This Part...

FMF Racing Yamaha YZ250F 19-24/YZ250FX 20-24 Powercore 4 Hex Muffler - 044451

The PowerCore 4 was developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is useable and compatible with every style of riding. Aluminum construction and stainless steel Hi-Flo end...

FMF Racing Yamaha YZ250F 19-24/YZ250FX 20-24/WR250F 20-21 Titanium Megabomb Header w/Mid Pipe - 044450

The ultimate power boost, the MegaBomb Headers improve performance along the bottom and mid-range powerband. Patented FMF technology combines the benefits of a longer header, with top end peformance of a shorter header.This Part...

FMF Racing Yamaha YZ250F 19-24/YZ250FX 20-24/WR250F 20-21 SS Megabomb Header w/Mid Pipe - 044449

The ultimate power boost, the MegaBomb Headers improve performance along the bottom and mid-range powerband. Patented FMF technology combines the benefits of a longer header, with top end peformance of a shorter header.This Part...