Hedman?s high-performance turbo headers are built in the USA using durable 16g T304 stainless steel primary tubes and bulletproof 3/8 in. T304 stainless flanges. All tubes are mandrel-bent to ensure a smooth flow of exhaust gasses to maximize the benefits of your turbo. Each pair of Turbo headers includes gaskets, mounting hardware, and V-band clamps to make integrating these headers into your turbo system easier and cost effective. This set fits GM 4.8L, 5.3L, 6.0L LS Series (GenIII/IV) Engines engines. These headers are uncoated, but coated models are also available. The headers are backed by Hedman's Limited Lifetime Warranty.