Cometic Chevy 1955-1985 Gen1 Small Block V8 Rear Main Seal-Align Honed 400 & Aluminum Block-2 Piece

This Cometic rear main seal uses Viton, a high-end fluoroelastomer rubber, known for its excellent heat and chemical resistance. It's designed with a larger 2.841-inch outer diameter, which helps ensure a solid seal against the crankshaft. This seal is a two-piece design, making installation easier on engines with an align-honed 400 block or an aluminum block.

This seal is built to handle the demands of Gen-1 Small Block V8 engines from 1955 through 1985. Its durable Viton construction means it can stand up to engine heat and common automotive fluids, helping to prevent oil leaks from the rear of the crankshaft.

This part fits a wide range of vehicles from the era, including models like the Chevrolet C10, Camaro, and GMC C1500. Always refer to the fitment guide to confirm compatibility with your specific vehicle.