FMF

Fmf Factory 4.1 Rct Exhaust - Aluminum 042397 Kawasaki -- KX 250 -- (2021, 2022, 2023, 2024); Kawasaki -- KX 250 X -- (2021, 2022)

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...

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...

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...

The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology? both internally and externallyShorter overall length that is less susceptible to crash damage and complementary to FMF's Factory...

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...

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...

Fmf Factory 4.1 Rct Exhaust - Aluminum 041604 Honda -- CRF450R -- (2021, 2022, 2024, 2023); Honda -- CRF450RX -- (2022, 2023, 2021, 2024)

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...

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...

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...

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...