Exhaust

The first Pro Circuit pipe built with bare metal finish, giving it a unique style that sets it apart from all other pipesDurable construction conforms to the natural shape of the motorcycle for exceptional fit and performanceReinforced brackets and...

Designed for maximum torque and power across torque curveMade from durable 16 gauge steel body with a lightweight aluminum rear end capFeatures a "quiet" 86-92dB sound levelIncludes U.S.F.S. approved, removable screen-type spark arrestor; replacement...

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...

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...

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...

Fmf Factory 4.1 Rct Exhaust System - Titanium - Carbon Fiber End Cap 044478 Yamaha -- YZ 450 FX -- (2024); Yamaha -- YZ 450 F -- (2024, 2023)

Fmf Factory 4.1 Rct Exhaust System - Aluminum - Stainless Steel Header - Carbon Fiber End Cap 044477 Yamaha -- YZ 450 F -- (2024, 2023); Yamaha -- YZ 450 FX -- (2024)

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...