Exhaust Headers Fit For 60-86 C-10 LS Chevy GMC LS1 LS2 LS3 LS6 LS9 MT001056 66695574Features Full 1 5 8" Primaries 2 1 2" Collector V8 Engines Only 4. 8L, 5. 3L, 5. 7L, 6. 0L, 6. 2L Engines Note: "For LS series engine swaps only" These do not work on standard SBC or BBC. Note: If using a larger 4L80E or older Turbo 350 400 transmission the bellhousing ears may need to be trimmed for proper clearance. Our headers are tucked in tight due to narrow older frame clearance. Fitment: C10, Pickups, Pannels: Chevy & GMC Trucks 1960+