FMF Racing

Overall increase in power and torqueDurable stainless steel and aluminum constructionSpace Age internal packing material for maximum longevityInternal shape of core uses Hi-Flo technologyEnhanced...

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power outputInternal ducts in the chambers of the RCT system increase internal volume...

We take fun seriously so we built the Mini Factory 4.1. This is an all out performance exhaust for play bikes. With the Mini Factory 4.1, you will be the king of backyard motocross and look great...

Superior power than stock systemsAvailable with titanium and stainless steel headersFMF's Factory Forward Engineering centralizes mass and is less prone to crash damageInnovative rear end cap...

Photo is not of actual muffler, just sample photo for now.  It's such a new item we don't have photos yet!  Mini version.   Similar styling to 4.1 RCT big bike products, with an aggressive look &...

The ultimate power booster featuring exclusive Ti-Metal constructionImproved bottom to mid-range powerProduce the low end of a longer header and the top end of a short headerLess susceptible to...

The expansion and contraction of exhaust sonics through the system causes increased flowPosition "Bomb" increases performance; horsepower is increased as much as 10%Utilize FMF's patented module...

Hi-Flo end cap boosts all-around performanceComputer-designed and dyno-tested for every 4-stroke applicationEnhanced sonic evacuation delivers a higher flow of exhaust gases, which increases powerA...

The ultimate power booster featuring exclusive Ti-Metal constructionImproved bottom to mid-range powerProduce the low end of a longer header and the top end of a short headerLess susceptible to...

Hi-Flo end cap boosts all-around performanceComputer-designed and dyno-tested for ever 4-stroke applicationEnhanced sonic evacuation delivers a higher flow of exhaust gases, which increases powerA...

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power outputInternal ducts in the chambers of the RCT system increase internal volume...

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power outputInternal ducts in the chambers of the RCT system increase internal volume...