All GHL products are built using only the highest quality T-304 stainless steel. All tubes are precision mandrel bent, and everything is hand TIG welded by skilled craftsmen. Factory mounting locations are used wherever possible to insure a quality fit every time. This exhaust system includes a 3" Stainless steel mandrel bent pipe from factory downpipe back, a 5" can-style muffler, and dual 4" double wall center tips.