The RS-2 is a really versatile and very potent exhaust; it is one of Yoshimuras most popular off-road exhaust systems and has proven its value on the race track for years. It is basically an evolution of the original Yoshimura TRC design but with a slightly different (pyramidal) shape that features increased volume. The volume enables a quieter system and larger core, which in turn increases power and power delivery. With gains throughout the powerband and the durability of high-grade stainless steel mid-pipe, you cant go wrong with this system. The powerful RS-2 exhaust design in a convenient slip-on muffler package. New diamond-shape slip-on allows for more packing material creating lower noise. Muffler shape increases durability and performance from muffler packing. Two-stage large race baffle allows optimal performance throughout the RPM range. Slip-on comes with a 304L stainless steel mid pipe. Two-piece end cap allows for installation of various inserts. Tapered front cap allows muffler mass to be moved forward for better center of mass. Step-by-step directions and all necessary hardware included for an easy installation. Comp Series mufflers come with a 96db sound insert / U.S.F.S.-approved spark arrestor installed in the muffler. Brushed aluminum muffler sleeve and CNC-machined aluminum mount bracket. Note:Optional Yoshimura 94db and 99db sound inserts available separately. Note: For closed course competition use ONLY. Not intended for street use.
Decades of racing development went into the design of the FMF Powercore 4 complete race exhaust to improve the power and performance of your dirt bike or ATV at a practical price. The FMF Powercore 4 is a muffler that will boost power and torque throughout the power range, making the Powercore 4 usable for all types of riding. FMF designed a Hi-Flo end cap and core for the Powercore 4 to increase power by creating a free flowing end cap and a core that allows room for exhaust pulse. This results in a consistent power curve. The FMF Powercore 4 uses and advanced cross-weave packing that is more durable then the traditional packing. The cross-weave packing also keeps the Powercore 4 at a reasonable sound level by dissipating the exhaust sound. FMF constructed the Powercore 4 muffler using aluminum to keep the weight down with a stainless steel head pipe and components for extended durability.