Exhaust

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 stainless steel mid-pipe mates to the computer-designed...

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 stainless steel mid-pipe mates to the computer-designed...

Fmf Factory 4.1 Rct Exhaust - Titanium 042398 Kawasaki -- KX 250 -- (2022, 2021, 2023, 2024); Kawasaki -- KX 250 X -- (2022, 2021)

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 features simple installation of tuning tip inserts or spark...

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 features simple installation of tuning tip inserts or spark...

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 for improved exhaust flow, resulting in power gains...

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 Forward Engineering - moving the muffler closer to the...

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 stainless steel mid-pipe mates to the computer-designed...

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 stainless steel mid-pipe mates to the computer-designed...

Fmf Factory 4.1 Rct Exhaust - Titanium 041605 Honda -- CRF450R -- (2021, 2022, 2023, 2024); Honda -- CRF450RX -- (2024, 2022, 2023, 2021)

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 stainless steel mid-pipe mates to the computer-designed...