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Header Gaskets - Performance - 290, 343, 390 American Motors V8 1966-69

Mr. Gasket, Performance Material, Rectangular Ports, 1.20" x 1.76"

PART# 850

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


BrandMr. Gasket
Collector Gaskets IncludedNo
Emission Code3
EngineAmerican Motors V8
Gasket LinePerformance
Port ShapeRectangle
Port Size1.20" x 1.76"
Product TypeHeader Gaskets
WarrantyLimited 90 Day Warranty
Part Number850


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.

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.

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