Sport performance Header system HEADER: California Air Resources Board (CARB) approved through '95 models. Bosal Performance Headers are designed to increase engine output and dynamo meter-tuned for the optimum engine performance. Headers are constructed from either 16 guage 304 stainless steel or 14 guage mild steel w/ceramic coating. Stainless steel headers have cast 304 3/8" thick flanges and mild steel headers have CNC ceramic coated mild steel 3" thick flanges. Included: Manifold and Gasket -