FMF Q4 S/A Muffler Hex for Yamaha WR450 - Part #044398Enhance your Yamaha WR450 with the FMF Q4 S A Muffler Hex (Part #044398). Designed for performance enthusiasts, this muffler features advanced engineering that incorporates internal baffles and chambers, along with innovative sound absorbing materials. This design not only accelerates exhaust flow but also minimizes noise and power loss, allowing you to get the most out of your ride without disturbing the peace. The FMF Q4 muffler is engineered to