Yoshimura R7 22-25 / MT-07 17-25 Race AT2 Stainless Full Exhaust, w/ Stainless MufflerYoshimura R7 22 25 MT 07 17 25 Race AT2 Stainless Full Exhaust, W Stainless Muffler When it came to crafting a special race exhaust for the Yamaha R7, we pulled out all the stops. Modeled after the titanium version, this Works Finish stainless system is the perfect balance between performance and value. Created with premium alloy material, then prototype after prototype until we reached the final test system. On a stock engine with no mods and 91