Yoshimura DR-Z400S/SM 00-24 RS-2 Stainless Full Exhaust, W/ Carbon Fiber MufflerYoshimura DR Z400S SM 00 24 RS 2 Stainless Full Exhaust, W Carbon Fiber Muffler Suzuki DR Z 400 S SM have been a staple of the street and super moto enthusiast for quite a long time. The RS 2 equipped with updated muffler branding and installed spark arrester, delivers all the power you'd expect from Yoshimura. Our dyno indicated a 4. 2% increase in max HP and 9% max torque, it's no wonder this is the go to system for the popular DR Z. Proudly made in