Quiet Core and Spark Arrestor Insert Combo for Q4 Hex

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 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.

Race-inspired, price-point muffler made for maximum power output. Aircraft-quality extruded aluminum canister with stainless steel components.This Part Fits:YearMakeModelSubmodel2019-2021HondaCRF110FBase

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 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...

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

Steel muffler with black finish can be directly installed on O.E.M. pipes with its special coupler: no gaskets needed!This Part Fits:YearMakeModelSubmodel1987-1999YamahaYFM350FW Big Bear 4x4Base1993-1999YamahaYFM400F Kodiak 4x4Base

Steel muffler with black finish can be directly installed on O.E.M. pipes with its special coupler: no gaskets needed!This Part Fits:YearMakeModelSubmodel1985-1987HondaATC250ES Big RedBase

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...

Two stroke kits include all applicable O-rings, springs, washers and gaskets. Four stroke kits include the exhaust gasket. Multi-cylinder applications include enough items for the entire machine. Polaris® kits include gasket, both header donuts and...

Two stroke kits include all applicable O-rings, springs, washers and gaskets. Four stroke kits include the exhaust gasket. Multi-cylinder applications include enough items for the entire machine. Polaris® kits include gasket, both header donuts and...