Rush 4&Prime, Big Louie Slash Down Slip-On Muffler 2.25&Prime, Baffle 32001-225 For performance, quality and sound there is nothing else like a Rush Performance Slip-On Muffler These mufflers have been engineered through thousand of hours of development, real world application and independently dyno tested in order to guarantee you the best performance and sound in the market Rush mufflers feature baffles that are wrapped in a high tech mat designed to disperse heat and retain sound State of the art chroming process allows Rush to offer a 1-year limited manufacturers warranty against manufacturers defects on Rush chrome products Rush mufflers will give you up to a 5 horsepower increase straight out of the box