Volant exhaust systems start with the finest stainless steel available. Every system is made from T304 stainless steel and highly polished to a mirror finish. The oversized stainless steel tubing is designed with minimal restrictions and mandrel bent to insure a free flowing exhaust system. A free flowing exhaust system is crucial to protecting today's performance engines because the hot exhaust gases are able to exit with little restrictions, lowering your truck engine's temperature and extending the life of your engine.