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Mr. Gasket

Mr. Gasket Performance Header Gaskets

Fits 1965-1990 Chevrolet 396-454 Big Block. Round Ports, 1.85 Inch x 1.90 Inch

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Mr. Gasket Performance Header Gaskets are manufactured from a heavy duty high-temperature material, .062 inch thick, consisting of an acrylic binder system to resist high temperature. Provides excellent sealing and durability with maximum torque retention to eliminate gasket failure. While precision die-cut for an excellent fit, it can be trimmed if necessary for modified port applications. For original equipment replacement, higher performance street, drag race and oval track use.

Fits Chevrolet 396,402,427,454 Gen IV Big Blocks with Round Ports up to 1.85 x 1.90 inches.


  • Manufactured from high-temperature acrylic blend exhaust material
  • Provides excellent sealing and durability
  • Precision die-cut for an excellent fit
  • Can be trimmed if necessary for modified port applications
  • For OE replacement, high performance street, drag race and oval track use

About Mr. Gasket

Using his own '57 Chevy as a rolling testbed, drag racer Joe Hrudka launched the most famous gasket company in the world more than half a century ago. Mr. Gasket is the go-to gasket source for racers with gaskets and fasteners that seal perfectly every time.

Brand Mr. Gasket
Collector Gaskets IncludedNo
Emission Code5
EngineChevrolet Big Block Mark IV
Gasket LinePerformance
Port ShapeSquare
Port Size1.85" x 1.90"
Product TypeHeader Gaskets
WarrantyLimited 90 Day Warranty
Part Number153

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.

  • Two header gaskets
Limited 90 Day Warranty: See Details

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