Thermostat Gasket - Small Block Chevy and Big Block Chevy V8 Engines

Thermostat Gasket Fits: Big Block Chevy - 1965-1990 - 396-454 Small Block Chevy 1955-1991 - 262-400 Small Block Mopar - 1979-'92 318/360 Small Block Mopar - 1992-'03 3.9L/5.2L/5.9L Magnum

PART# 740C

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$5.29   Suggested Retail
$4.76   Your Price
Estimated shipping date: 06/24/2019
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This is a high quality gasket that will seal that leaking water neck, and provide you with years of service. This gasket works well in all applications.


  • Made From Cellulose/Nitrile Composition
  • Provides Excellent Sealing And Durability
  • These Gaskets Are Die Cut For a Precision Fit
  • Fits Small Block Chevy V8 Engines 1955-'90
  • Fits Big Block Chevy V8 Engines 1965-'90
  • Fits Small Block Chrysler 318/360 1979-'92
  • Fits Small Block Chrysler 3.9L/5.2L/5.9L Magnum 1992-'03


BrandMr. Gasket
Emission Code5
EngineChevrolet Big Block Mark IV
Chevrolet Small Block Gen I
Chrysler Small Block LA
Chrysler Small Block Magnum
Product TypeWater Neck Gaskets
WarrantyLimited 90 Day Warranty
Part Number740C


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.

Warranty Information

Limited 90 Day Warranty: See Details


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