These long-tube swap headers fit 1968-1974 GM C10/20 2WD trucks with the GM Gen-V LT engine. The Long tube design optimizes engine performance and the 304 stainless steel construction looks great and provides corrosion resistance. These headers are designed to work as part of the C10 LT swap system for an easy bolt-in engine swap (compatible with Hooker Blackheart engine mounts, crossmembers, oil pans, and exhaust systems).