2015 - 16 Mustang GT 5.0L 304 stainless steel 3 catback dual - exhaust with H - pipe, retro chambered mufflers with 2.5 cores and mirror - polished stainless steel slash - cut conical double - wall tips. Includes hangers and clamps and is designed to mate to Stainless Works Ford Mustang headers (which maintains a full 3 diameter, and does not neck - down.)