Features： 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+

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