The FMF 4.1 Chad Wienen Slip On Exhaust for the Yamaha YFZ450R incorporates Resonance Chamber Technology, with patented core shape lowers sound level while maintaining maximum power output and canister shape increases internal volume for more sound absorbing material. The chamber is designed to enhance and refine exhaust pressure. The exhaust is tuned with optimized core specifications and comes with the quality, craftsmanship and performance expected from FMF. Meets AMA and FIM sound requirements.
Type: Slip On
Finish: Blue Anodized
Endcap: Carbon Fiber
Spark Arrestor: Screen Insert (included)
Quiet Insert: 94dB Insert (included)