Fmf Powercore 4 Slip-on Muffler For Yamaha Yz450f & Wr450f 2003-2006

The Hi-Flo modular end cap and internal shape utilize Hi-Flo technology to increase flow efficiency, resulting in higher power output and improved throttle response. Built for Yamaha models from 2003 to 2006, it is an ideal upgrade for riders seeking increased horsepower and exhaust flow without extensive modifications.