This system is constructed of 2 IN - 3 IN mandrel-bent 409 stainless steel tubing for maximum strength and durability. EPA compliant catalytic converters. Factory style laser cut 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. 100% MIG-Welded for race-proven strength and durability.