Tractor-like bottom end pull, thicker midrange and rugged 18-gauge steel construction.

The FMF Rev Pipe focuses on power delivery in the middle and upper RPMs of the powerband. If you're short on power up top, want more time between shifts and spend your time in deep berms or sand, the Rev is the pipe for you.

The FMF Rev Pipe focuses on power delivery in the middle and upper RPMs of the powerband. If you're short on power up top, want more time between shifts and spend your time in deep berms or sand, the Rev is the pipe for you.

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.

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...

Race-inspired, price-point muffler made for maximum power output. Aircraft-quality extruded aluminum canister with stainless steel components.This Part Fits:YearMakeModelSubmodel2004-2009,2011-2021HondaCRF50FBase2000-2003HondaXR50RBase

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.

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...

A 4-Stroke header system that incorporates FMF's patented Power Bomb module at a precise location in the initial stage of the header system; by positioning the "Bomb" at this key point, the expansion and contraction of exhaust sonics through the system...

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...

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...

The redesigned PowerBomb is a 4-stroke header that incoporates FMF's patented PowerBomb module at a precise location in the initial stage of the header, resulting in performance gains and improved flow.This Part...