Rush Slash Down Cut Slip-On Mufflers w/2.5" Baffles 15301-250 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 warranty against manufacturers defects on Rush chrome products Rush mufflers will give you up to a 5 horsepower increase straight out of the box 3 1/2in. mufflers Baffle and mat kits sold in sets