YOSHIMURA RS-4 Signature Series Muffler Aluminum/Carbon End Cap for: Yamaha YZ450F for WR450F

In addition to their aesthetics, the Yoshimura USA RS-4 Muffle are at the cutting edge of exhaust technology.

• A high-performance muffler that optimises the power output of your machine
• Product is a direct result of MX World and US championship development
• 2 cores inside the RS-4 muffler: double sound absorption and reduced adverse effects caused by exhaust gases
• Muffler fabricated from aluminium/stainless with carbon end cap