This system features Dual, Tuned Helmholtz resonators integrated into its design to improve tone and eliminate drone. 100 TIG - welded by certified craftsmen for race proven strength and durability. TIG - welding provides the strongest welds reducing stress cracks. This muffler delete is constructed of durable mandrel bent, brushed 304 stainless steel tubing for maximum performance, corrosion resistance and durability. This muffler delete is a direct bolt - on system, which requires no cutting or modifications for a hassle - free installation. Utilizing state - of - the - art computer - aided design technology, this muffler delete designed for custom, high tolerance factory fitment.