These Builder Series tailpipes are constructed from 2.50 in. mandrel-bent 16-gauge aluminized steel tubing for maximum flow, tuck up high in the chassis for good clearance and exit straight-out the back under the rear bumper. Designed to be used with Side Inlet/Center Outlet mufflers such as part# 942546 (Super 44 Series) or 942551 (50 Series) mufflers. Covered by our 3-year Limited Warranty. Note: Not designed to fit in factory bumper cutouts. Some fitment may be necessary. Does Not include installation hardware or exhaust tips.