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Header Install Kit - Ultra-Seal - 326-455 Pontiac V8 1964-79

Mr. Gasket, Ultra-Seal Material, Oval Ports

PART# 7665G

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Header Installation Kit - Pontiac V-8 1964-79 326-455 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


BrandMr. Gasket
Collector Gaskets IncludedYes
Emission Code3
EnginePontiac V8
Gasket LineUltra-Seal
Port ShapeOval / D
Port Size1.55" x 1.94"
Product TypeHeader Install Kit
WarrantyLimited 90 Day Warranty
Part Number7665G

Service Parts


This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

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      *Free Shipping & Handling only offered to the contiguous US on orders over $100.

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