RPT slip-on mufflers make use of all the high-tech features of regular 3" slip-on mufflers RPT style billet tip at the rear Bodies expand from 3" in the front to 3-1/2" in the rear 2" constant velocity inner tubes for exceptional sound and performance Class E fiberglass and stainless steel mesh Exceptional sound and performance High-density sound-absorbing glass provides deep tone Made in the U.S.A.