This system is constructed of 2-1/2" - 3" mandrel-bent 409 stainless steel tubing for maximum strength and durability. This kit comes with a EPA compliant catalytic converters for a bolt-on and go installation. A mitered merge collector is used to decrease turbulence and increase exhaust velocity resulting in increased horsepower, torque and improved throttle response. State-of-the-art computer-aided design technology is utilized for precise vehicle fitment. 100% MIG-welded for strength and durability