4 Stroke

FMF Racing HQV FE450 20-23/KTM 450XCF 23 Anod TI Factory 4.1 RCT Sys w/SS MB Header/Mid - 045654

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...

FMF Racing KTM 350XCF-W 20-22/HQV FE350 20-22/GG EC350F 21 Anod TI F4.1 RCT Sys w/SS MB Header/Mid - 045653

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...

FMF Racing Factory 4.1 Aluminum w/Carbon Cap - 045649

The Factory 4.1 exhaust system with the Powerbomb header is FMF's premier exhaust system. This system is perfect for the track or dunes, and is used by factory teams such as KTM, Epic Can-Am and Rath Racing. The Powerbomb header is made of durable...

FMF Racing HQV FE450 20-23/KTM 450XCF-W 23 SS Megabomb Header/Mid Pipe - 045644

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.

FMF Racing HQV FE250 20-21/ GG EC250F 21 SS Megabomb Header/Mid Pipe - 045642

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.

FMF Racing KTM 250-450SXF 15-18FE/XCF 16-18/ HQV FX250-450-501 16-18 TI Anod 4.1 RCT SO Muffler - 045596

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...

FMF Racing Beta 350/390/400/430/450/480/498/500/520 10-18 Hex Q4 S/A Muffler - 045522

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...

FMF Racing Beta 350-390 10-18 SS Powerbomb Header - 045520

The redesigned PowerBomb is a 4-stroke header that incoporates FMF's patented PowerBomb module at a precise location in the initial stage of the header, resulting in performance gains and improved flow.

FMF Racing Yamaha YZ450F 24-25 Anod Fact 4.1 RCT w/ R. Carbon Cap Comp Sys w/TI MB Header/ Mid Pipe - 044478

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...

FMF Racing Yamaha YZ450F 24-25 AL Factory 4.1 RCT w/ R. Carbon Cap Comp Sys w/SS MB Header/ Mid Pipe - 044477

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...

FMF Racing 23-25 Yamaha YZ450F Titanium Megabomb Header w/Mid Pipe - 044476

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.

FMF Racing Yamaha YZ450F 23-25 SS Megabomb Header w/Mid Pipe - 044475

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.