Zimmermann’s Pro Exhaust Systems feature a unique Stainless Steel construction for a brilliant, chrome like appearance that is tarnish resistant. The Zimmermann Pro Stainless exhaust systems also offer a unique deep sound, and outstanding durability that are unmatched by conventional aluminum mufflers2620X gas system, mostly common in Futura Gas or X-Cell Gas, Complete system with teflon coupler, Header and clamps. made by Zimmermann