Yoshimura RS-4 Stainless Slip-on Muffler 2014-18 Yamaha YZ/WR250F/X | 231012D320 F800GS For machines originally equipped with

For machines originally equipped with non-O-ring chains

Chiseled shoulder block shape penetrates the surface to enhance side grip

Today you will find one behind the front number plate of many top level national pros (this includes Ryan Dungey)

Exclusive high-grip rubber dual-density compound outer sole

Large mesh vents for maximum airflow

Yoshimura RS-4 Stainless Slip-on Muffler 2014-18 Yamaha YZ/WR250F/X | 231012D320 F800GS For machines originally equipped withFitment: Yamaha WR250F 2015 2018 Yamaha YZ250F 2014 2018 Yamaha YZ250FX 2015 The work that went into developing the RS 4 muffler has paid big dividends in Off road Racing; winning multiple Supercross and Motocross titles since it's inception. We've developed the current generation RS 4 based on that research & development, and the result is a unique design that provides an unrivaled combination of power and quiet exhaust tone. The RS 4 features a