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Cometic Pontiac 326/389/421 V8.070in MLS Cylinder Head Gasket - 4.300in Bore

Upgrade your Pontiac's engine with Cometic's high-performance MLS cylinder head gasket. Designed for 326/389/421 V8 engines, this gasket features a 4.300in bore and a.070in thickness. Its HP shim technology increases clampload around the combustion chamber, ensuring a tighter seal and improved engine performance.

  • Coated on both sides with Viton for enhanced durability
  • MLS (Multi-Layer Steel) construction for improved sealability
  • Designed for high-performance applications
Make Model Year Type
Pontiac Bonneville 1959 Base
Pontiac Bonneville 1959 Custom
Pontiac Bonneville 1959 Safari
Pontiac Bonneville 1960 Base
Pontiac Bonneville 1960 Custom
Pontiac Bonneville 1960 Safari
Pontiac Bonneville 1961 Base
Pontiac Bonneville 1961 Custom
Pontiac Bonneville 1961 Safari
Pontiac Bonneville 1962 Base
Pontiac Bonneville 1962 Custom
Pontiac Bonneville 1962 Safari
Pontiac Bonneville 1963 Base
Pontiac Bonneville 1963 Safari
Pontiac Bonneville 1964 Base
Pontiac Bonneville 1964 Safari
Pontiac Bonneville 1965 Base
Pontiac Bonneville 1965 Safari
Pontiac Bonneville 1966 Base
Pontiac Bonneville 1966 Safari
Pontiac Catalina 1959 Base
Pontiac Catalina 1959 Safari
Pontiac Catalina 1960 Base
Pontiac Catalina 1960 Safari
Pontiac Catalina 1961 Base
Pontiac Catalina 1961 Safari
Pontiac Catalina 1962 Base
Pontiac Catalina 1962 Safari
Pontiac Catalina 1962 Ventura
Pontiac Catalina 1963 Base
Pontiac Catalina 1963 Safari
Pontiac Catalina 1963 Ventura
Pontiac Catalina 1964 2+2
Pontiac Catalina 1964 Base
Pontiac Catalina 1964 Safari
Pontiac Catalina 1964 Ventura
Pontiac Catalina 1965 2+2
Pontiac Catalina 1965 Base
Pontiac Catalina 1965 Safari
Pontiac Catalina 1965 Ventura
Pontiac Catalina 1966 2+2
Pontiac Catalina 1966 Base
Pontiac Catalina 1966 Safari
Pontiac Catalina 1966 Ventura
Pontiac Grand Prix 1962 Base
Pontiac Grand Prix 1963 Base
Pontiac Grand Prix 1964 Base
Pontiac Grand Prix 1965 Base
Pontiac Grand Prix 1966 Base
Pontiac GTO 1964 Base
Pontiac GTO 1965 Base
Pontiac GTO 1966 Base
Pontiac Star Chief 1959 Base
Pontiac Star Chief 1960 Base
Pontiac Star Chief 1961 Base
Pontiac Star Chief 1962 Base
Pontiac Star Chief 1963 Base
Pontiac Star Chief 1964 Base
Pontiac Star Chief 1965 Base
Pontiac Star Chief 1966 Base
Pontiac Star Chief 1966 Executive
Pontiac Tempest 1961 Base
Pontiac Tempest 1961 LeMans
Pontiac Tempest 1961 Safari
Pontiac Tempest 1963 Base
Pontiac Tempest 1963 Safari
Pontiac Tempest 1964 Base
Pontiac Tempest 1964 Custom
Pontiac Tempest 1964 Safari
Pontiac Tempest 1965 Base
Pontiac Tempest 1965 Custom
Pontiac Tempest 1965 Safari
Pontiac Tempest 1966 Base
Pontiac Tempest 1966 Safari
Pontiac Ventura 1960 Base
Pontiac Ventura 1961 Base
Cometic manufactures engine gaskets for both domestic and import vehicles. Gasket kits are available for both bottom end and top end for the most popular vehicles, while their MLS head gaskets are known to be some of the best in the industry. Cometic’s 70,000 square foot, state-of-the-art R&D and manufacturing facility allows them to design gaskets for engines using the latest technology, such as Multi-Layer Steel (MLS) gaskets as well as using synthetic blends such as Aramid Fiber.
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