The Detroit Speed, Inc. 1970-1974 Camaro/Firebird with DSE Subframe or DSE Chevy II Frame Stainless Steel Headers feature a 1-3/4" primary tube diameter for SBC engines. These headers come with 4-way inline merge collectors featuring V-Band clamps. Our headers are designed and engineered for standard port SBC engines used with the second gen Camaro Hydroformed Subframe and Chevy II Front Frame. Each header features a O2 sensor bung in the collector. These headers are designed for performance, maximum ground clearance, and a clean engine compartment appearance. The DSE Stainless Steel headers are durable, attractive, and come with the necessary clamps to make installation easy. 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.