DC Sports Turbo Manifolds are dyno tested for all out performance for racing applications only. Extensive research and development goes into each component to ensure the best performance for your vehicle. They are precision bent on the CNC mandrel benders using data acquired from the non-contact digitizing scanner. The flanges are CNC machined. DC Sports machine-grind the flange-mating surface to ensure a leak-free seal and use a robotic welder to attach the flange to the header pipes. Turbo Manifolds are available in 100% T-304-stainless stell only and are for use on OFF-Road vehicles only (not C.A.R.B. exempt). Includes comprehensive instructions and all necessary hardware.