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Mr. Gasket CopperSEAL Header Gaskets

Fits 1968-1988 Ford 429-460 Big Block except Boss,CJ & SCJ. Rectangular Ports, 1.25 Inch X 2.08 Inch


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$45.99   Suggested Retail
$41.39   Your Price
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Will not fit Boss 429; Cobra Jet, or Super Cobra Jet exhaust ports.


Mr. Gasket CopperSEAL 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. Sold as a pair.


  • Manufactured from “Dead Soft” (solid) .043" thick copper material
  • .051" embossment around each exhaust port to seal irregular surfaces. Total gasket thickness .094"
  • Provides excellent sealing and durability
  • Conforms to and seals minor surface irregularities
  • For high performance street, drag race, oval track and turbocharged (extreme heat) applications


BrandMr. Gasket
Collector Gaskets IncludedNo
Emission Code5
EngineFord Big Block
Gasket LineCopper-Seal
Port ShapeRectangle
Port Size1.25" x 2.08"
Product TypeHeader Gaskets
WarrantyLimited 90 Day Warranty
Part Number7165MRG


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.

Tech Resources

Will not fit Boss 429; Cobra Jet, or Super Cobra Jet exhaust ports.

Warranty Information

Limited 90 Day Warranty: See Details


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      *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

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