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Mr. Gasket

Mr. Gasket Header Install Kit - Ultra-Seal

Fits 1964-1979 Pontiac 326-455 V8 with Oval Ports

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Header Installation Kit - Pontiac V8 1964-1979 326-455 D-Port Port Center. Includes gaskets and fasteners necessary for header installation. Made using premium Ultra-Seal exhaust and collector gaskets. Mr. Gasket header and collector bolts deliver necessary clamp-load to seal flange mating surfaces.


  • Oval / "D" Ports
  • Port Size 1.55" x 1.94"
  • (2) Sets of Collector Gaskets 3.00" & 3-1/2"
  • Includes Header & Collector Bolts

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 IncludedYes
Emission Code5
EnginePontiac V8
Gasket LineUltra-Seal
Port ShapeOval / D
Port Size1.55" x 1.94"
Product TypeHeader Install Kit
WarrantyLimited 90 Day Warranty
Part Number7665G

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.

Limited 90 Day Warranty: See Details

    *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.