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

Thermostat Gasket Big Block Chevy - 1965-1990 - 396-454 Small Block Chevy 1955-1991 - 262-400

PART# 740C

$5.01   Suggested Retail
$4.51   Your Price
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In Stock  


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


BrandMr. Gasket
Emission Code1
EngineChevrolet Big Block Mark IV
Chevrolet Small Block Gen I
Product TypeWater Neck Gaskets
WarrantyLimited 90 Day Warranty


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