He351 billet wheel over S475, 38mm external waste gate, 3-piece exhaust manifold, hot pipe, cold pipe. Manifold, turbine housings, hot pipe all coated with Ceramikote. This kit will move enough air for 700 hp, & this kit will also fit in a Fummins conversion. I have towed 14k lbs up an 8% grade at 65 mph in the Nevada desert in the middle of summer with the a/c on & maintained 1100°F EGTs! And I still power to spare! A great kit. $2500