Exhaust

The ultimate power booster Improved bottom to mid-range power Less susceptible to damage than a longer header Effectively reduces sound output by as much as 1.5 dB Runs well with sound restricting mufflers. HEADER SS MGBMB/MID PIPE

Closed course use only.. HEADER TI MGBMB YZ450F

The ultimate power booster Improved bottom to mid-range power Produce the low end of a longer header and the top end of a shorter header Effectively reduces sound output by as much as 1.5 dB. HEADER TI MGBMB W/MID

The ultimate power booster featuring exclusive Ti-Metal construction Improved bottom to mid-range power Produce the low end of a longer header and the top end of a short header Less susceptible to damage than a long header Runs well with...

The ultimate power booster Improved bottom to mid-range power Produce the low end of a longer header and the top end of a short header Less susceptible to damage than a long header Effectively reduces sound output by as much as 1.5 dB Run well with...

The ultimate power booster featuring exclusive Ti-Metal construction Improved bottom to mid-range power Produce the low end of a longer header and the top end of a short header Less susceptible to damage than a long header Runs well with...

For closed course competition use only. HEADER TI MGBMB KX450F

The ultimate power booster featuring exclusive Ti-Metal construction Improved bottom to mid-range power Produce the low end of a longer header and the top end of a short header Less susceptible to damage than a long header Runs well with...

The ultimate power booster featuring exclusive Ti-Metal construction Improved bottom to mid-range power Produce the low end of a longer header and the top end of a short header Less susceptible to damage than a long header Runs well with...

Superior power than stock systems Available with titanium and stainless steel headers FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage Innovative rear end cap features simple installation of tuning tip inserts or spark...

Developed over years of championship off-road racing Twin-stage core design for lower sound output and extended life of packing material Comes standard with spark arrestor Fits stock and PowerBomb header. MUFFLER Q4 S/A YFZ450

Developed over years of championship off-road racing Twin-stage core design for lower sound output and extended life of packing material Comes standard with spark arrestor Fits stock and PowerBomb header. MUFFLER Q4 SA YFZ450