The Detroit Speed, Inc. Stainless Steel Headers are designed and engineered for Ford Coyote/Boss 302 engines with the Detroit Speed, Inc. Aluma-Frame installed. These headers are designed for performance, maximum ground clearance, and a clean engine compartment appearance.All stainless steel headers are exclusively manufactured by Pro Fabrication for Detroit Speed, Inc. suspension applications. These headers are made with high quality material here in the USA.