FMF Racing Yamaha YZ450F 03-05/WR450F 03-06 Powercore 4 Muffler

If you're looking to get more out of your 2003-2006 Yamaha WR450F or 2003-2005 YZ450F on the trail or track, this FMF Racing Powercore 4 muffler is designed to help. It's built to boost both horsepower and torque across the entire range of your engine's RPMs, making the power gains feel usable for any riding style.

This muffler uses a well-built aluminum body combined with durable stainless steel components for the end caps and internal structure. This construction offers a good balance between performance and strength, ensuring it can handle the demands of off-road riding. It's a completely redesigned unit for late-model applications, aiming for a noticeable improvement in power delivery that you can feel when you twist the throttle.

A removable spark arrestor is included, which is important for trail riding in areas with fire restrictions. This slip-on muffler is engineered to integrate with your existing exhaust system, making installation straightforward.