Visit: ORO2U.COM for the latest prices


The Factory 4.1 and its patented core shape lowers sound level while maintaining maximum power output. The canister shape increases internal volume for more sound absorbing material. Plus our patented chamber design enhances and refines exhaust pressure. The Factory Forward Engineering centralizes mass and is less prone to crash damage. Also, includes a tuned exhaust with optimized core specifications for each application and an innovative CARBON FIBER rear endcap for simple installation of tuning tip inserts or spark arrestor.


We developed the PowerCore4 to increase the horsepower and torque throughout the entire power curve and give you a noticeable power increase that is very usable and beneficial, no matter what your riding style or ability is.


FMF is the leader in high performance quiet technology and our Q4 is the next evolution in off road exhaust. The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available. With the Q4 you don't need to hear the power, just feel the power!


The Titanium 4 racing exhaust system will give the ATV rider the huge weight savings of titanium with an overall horsepower and torque gain. All mufflers are available in a natural titanium finish or in a blue anodized finish. FMF's Titanium 4 is fully tunable with modular end caps that allow for easy changes to shape the powerband of the machine and alter the sound level.

*Titanium 4 mufflers must be combined with an FMF mid-pipe

The science behind the Megabomb header may be our greatest engineering accomplishment to date. You can bolt on a Megabomb for as much as a 3hp boost, plus the Megabomb actually reduces noises levels by as much as 1.5dB. Used by Factory Teams, the Megabomb is the next level technology you can have today.


The redesigned PowerBomb is a four-stroke header that incorporates FMF’s patented PowerBomb module at a precise location in the initial stage of the header. By positioning this “Bomb” at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. Result is a flow increase of nearly 10%! The outer chamber in the Powerbomb allows the air to expand, cool and ramp back up at a higher velocity.

Hi -FLO  

FMF Hi-Flo headers are available in both single and dual port systems providing excellent weight savings combined with improved performance characteristics that help make every four stroke rip.
The Hi-Flo was designed to enhance the overall power of your machine making it the perfect choice for upgrading your stock system.