This system is constructed of 2-1/4 IN - 2-1/2 IN mandrel-bent 409 stainless steel tubing for maximum strength and durability. EPA compliant catalytic converters. Factory style laser cut machined mild steel flanges are used used for a secure leak-free seal. Utilizing factory style hangers and flanges this system is designed to fit in the stock locations with no cutting or modifications required for a hassle-free installation. Utilizing state-of-the-art computer-aided design technology, this system is designed for custom, high tolerance factory fitment. 100% MIG-Welded for race-proven strength and durability