This system is constructed of 2-1/2 IN - 3 IN mandrel-bent 409 stainless steel tubing for maximum strength and durability. This kit comes with a EPA Compliant catalytic converter for a bolt-on and go installation. Utilizing a factory style flange this system 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 exhaust system is designed for custom, high tolerance factory fitment. 100% MIG-welded for strength and durability.