Lightest muffler in the industry at just over 3lbs. Guaranteed not to lose HP. The carbon fiber muffler will fit 2010-16 Polaris Rush/Switchback/RMK (Will not fit the AXYS chassis). The industry leading carbon fiber muffler has become leading seller in the Polaris line-up with its proven durability and performance. Simple installation with zero jetting or fuel programming required.