Yoshimura Rs-2 Enduro Slip-On Exhaust Kawasaki Klx300R The Yoshimura Rs-2 is an evolution of the original TRC exhaust, engineered to increase power output over stock exhaust systems. Rs-2 is a potent and versatile design with increased exhaust flow capability and outstanding performance. Features Diamond-shaped sleeve Large core and increased muffler packing volume means quieter operation Stainless steel cone end-cap Stainless steel tail-pipe U.s. Forest Service Approved spark arrester included