FACTORY 4.1 RCT TITANIUM ANODIZED SL (Slip-On) W/ CARBON CAP 043373 YAMAHA-YZ250F-2007 You can bolt on a

You can bolt on a Megabomb with an existing FMF Racing slip on for as much as a 3hp boost

FMF EXTREME and since 1973 have been about pushing the boundaries inside of the FMF Factory and the gnarliest of trails

-Enhanced sonic evacuation provides for higher flow and increased power

The supercross version is designed for more low to mid-range power where the moto version is focused in the mid to upper RPM range

and increased over-rev

FACTORY 4.1 RCT TITANIUM ANODIZED SL (Slip-On) W/ CARBON CAP 043373 YAMAHA-YZ250F-2007 You can bolt on aThe 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 Engineering moving the muffler closer to the motor to centralize mass. The Factory 4. 1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at