The COBB Uppipe is constructed of rugged, 14-gauge, 2-inch diameter stainless steel tubing to endure the intense exhaust gas temperatures these turbocharged engines put out. These Uppipes are CNC mandrel bent, ensuring precise and consistent fitment, eliminating the need for a weak flex joint section. The Uppipe inlet diameter matches the inner diameter of the gasket to maximize flow to the turbo. The extra-thick flanges are cut from 1/2″ 304 stainless steel to prevent warping and eliminate high-pressure exhaust leaks. The five turbo-flange studs come pre-installed. This gorgeous Uppipe is built to last for many long years of service.