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Mr. Gasket Copper Seal Header Gaskets 262-400 Chevrolet Small Block Gen I 1955-1991

Rectangular Ports

PART# 7153

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Mr. Gasket Copper Seal header gaskets are a high quality copper gasket that performs extremely well and are reusable. We recommend this in all racing and high performance applications. They are for stock heads unless indicated, and work well in high heat and turbocharged applications.


  • Manufactured from “Dead Soft” (solid) .043˝ thick copper material.
  • .051˝ embossment around each exhaust port to seal irregular surfaces.
  • Total gasket thickness .094˝.
  • Conforms to and seals minor surface irregularities.
  • End holes are slotted for easier installation
  • For high performance street, drag race, oval track and turbo-charged (extreme heat) applications.


BrandMr. Gasket
Collector Gaskets IncludedNo
Emission Code5
EngineChevrolet Small Block Gen I
Gasket LineCopper-Seal
Port ShapeSquare
Port Size1.45" x 1.55"
Product TypeHeader Gaskets
WarrantyLimited 90 Day Warranty
Part Number7153


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.

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Warranty Information

Limited 90 Day Warranty: See Details


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