These headers are designed for use with angle or straight plug heads and 602 Crate or standard Chevy engines. Built to fit a '70-81 Camaro. Clears the stock clutch linkage, engine can be in stock location or have additional engine setback and they clear the AFCO style rear engine mounts. CNC Laser Cut Flanges and optimized tube length for best overall performance. 17 gauge steel construction and surfaced flanges make this a durable header that remains leak free for multiple racing seasons. Comes standard with a Full One Year Warranty. ½ sets (Crash Replacements) are also available.