Rear Main Seal - Big Block Chevy - Viton® - High Vacuum

Rear Main Seal - Big Block Chevy - Viton® - High Vacuum - Recommended for use with external vacuum pump. Fits: 396-454 Big Block Chevy 1965-'90

PART# 1972

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Design for high engine vacuum use - external vacuum pumps.


BrandMr. Gasket
Emission Code1
EngineChevrolet Big Block Mark IV
Product TypeRear Main Seal
Rear Main Seal StyleTwo Piece
Part Number1972


This part is legal for use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it has a California Air Resources Board Executive Order number or is a direct or consolidated replacement part.

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
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        *Free Shipping & Handling only offered to the contiguous US on orders over $100.

        Some parts are not legal for use in California or other states with similar regulations.