Exhaust

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...

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...

Complete systemSuperior power and performance - horsepower improved throughout the rpm rangeFactory forward engineering centralizes mass, improves handling Yamaha -- YFZ 450R 4x2 -- (2010, 2014, 2013, 2016, 2011, 2017, 2012, 2015, 2018, 2009, 2019,...

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...

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 System - Titanium - Carbon End Cap 042406 Kawasaki -- KX 450 -- (2024)

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

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 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...