RPT slip-ons make use of all of the high-tech features of the regular 3" slip-on mufflers Billet RPT style tip finishes off the rear Bodies expand from 3" at the front to 3-1/2" at the rear 2" constant velocity cores for exceptional sound and performance Bonded e-glass and stainless steel mesh Exceptional sound and performance High density e-glass provides a deep tone Made in the U.S.A.. MUFFLERS 3" RPT R BLK XL