FMF

Factory 4.1 muffler available in natural titanium or blue anodized titanium with titanium end capsThe lightest mufflers availableSuperior power and performance - horsepower improved throughout the...

Fmf Factory 4.1 Muffler 042394 Kawasaki -- KX 250 -- (2021, 2022, 2023, 2024); Kawasaki -- KX 250 X -- (2021, 2022)

Fmf Factory 4.1 Muffler 042396 Kawasaki -- KX 250 -- (2021, 2022, 2023, 2024); Kawasaki -- KX 250 X -- (2021, 2022)

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

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

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...

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 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 the FMF Resonance Chamber Technology™ both internally and externally • In addition, achieves a shorter overall length that is less susceptible to crash damage and...

Fmf Factory 4.1 Rct Exhaust System - Titanium - Carbon End Cap 042406 Kawasaki -- KX 450 -- (2024)

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