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

Offered as a standard Mini Powercore 4

most models below 93dB

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

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