Fmf Racing 042291 Factory 4.1 RCT Slip-On - Aluminum Muffler - Stainless Midpipe - Carbon Endcap helmets-helmet-accessories-replacement-parts-cheek-pads 2004-2024 Yamaha YZ450F

2004-2024 Yamaha YZ450F

2011-2016 KTM 200 XC-W

2009 Suzuki GSX-R1000

2013 KTM 85 SX (19/16)

Shovelhead cylinders include headbolts

Fmf Racing 042291 Factory 4.1 RCT Slip-On - Aluminum Muffler - Stainless Midpipe - Carbon Endcap helmets-helmet-accessories-replacement-parts-cheek-pads 2004-2024 Yamaha YZ450FMaterial: Aluminum Compatible with stock or FMF header. Incorporating Resonance Chamber Technology. Patented core shape lowers sound level while maintaining maximum power output. Patented canister shape increases internal volume for more sound absorbing material. Patented chamber design to enhance and refine exhaust pressure. Factory Forward Engineering centralizes mass and is less prone to crash damage. Tuned exhaust with optimized core