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Mr. Gasket

Mr. Gasket Steel Shim Head Gasket

Fits 1965-1990 Chevrolet 396-454 Big Block. 4.370 Inch Bore, .020 Inch Compressed Thickness

Part # 1131G Be the first to write a review

Mr. Gasket Steel Shim Head Gasket

In Stock
Free Shipping - Lower 48 US States
MSRP $36.95
$29.56
Save $7.39
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5

Emissions

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

See Emissions Details

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Mr. Gasket Steel Shim Cylinder Head Gaskets are for high performance street machines, drag racing and oval track racing. With today's extreme compression ratios you need stronger more durable gaskets. Mr. Gasket steel shim gaskets are made from .020 inch steel shim stock which is thinner than most composite gaskets increasing engine compression. Stress formed embossments will seal the extreme cylinder pressure.

Features:

  • Manufactured from .020" steel shim stock.
  • Thinner than composition head gaskets - increases engine compression.
  • Stress formed embossments seal extreme cylinder pressures.
  • For high performance street, drag race and oval track use.

About Mr. Gasket

Explore Mr. Gasket's range of performance auto parts for engines, exhaust systems, and more at our official retailer, Holley.com!

ApplicationBig Block Chevy
Brand Mr. Gasket
CategoryEngine
Compressed Thickness0.02 IN
Compression RatioUp to 12:1
Emission Code5
EngineChevrolet Big Block Mark IV
Gasket Bore4.37 IN
Gasket LinePerformance
MaterialSteel Shim
PackagingRetail
Product TypeHead Gasket
Quantity Per Pkg.1
WarrantyLimited 90 Day
Weight0.5
UPC084041022818
Part Number1131G
5

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.
Instructions - 97140221.pdf
Note: Steel Shim Gaskets are not recommended for use with aluminum cylinder heads since the endorsements in the gasket will cause indents in the deck surface of the heads.
Limited 90 Day: See Details

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