Factory forward engineering helps maintain proper center of gravity and neutral handling. Larger volume canister yet lightweight overall, repacking intervals lengthened. USFS-approved turbine spark...

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

Replacement exhaust springs and o-ring kits for use with stock or FMF setups. Vehicle specific fitment

Hand-pounded seams for superior flow, lighter gauge metal for the Factory sound. Hand pounded seams for smooth flow transitions 19-gauge steel on the header position Lighter 20-gauge steel on...

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

Hand-pounded seams for superior flow, lighter gauge metal for the Factory sound. Hand pounded seams for smooth flow transitions 19-gauge steel on the header position Lighter 20-gauge steel on...

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

Factory forward engineering helps maintain proper center of gravity and neutral handling. Larger volume canister yet lightweight overall, repacking intervals lengthened. USFS-approved turbine spark...

Factory forward engineering helps maintain proper center of gravity and neutral handling. Larger volume canister yet lightweight overall, repacking intervals lengthened. USFS-approved turbine spark...

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...

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...

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...