Cometic C9239 MLS Head Gasket - Stock Bore - .043" Thickness

The Cometic C9239 is a premium Multi-Layer Steel (MLS) head gasket engineered for demanding sealing applications. Designed for 1936-1947 Harley-Davidson Knucklehead engines with stock bore, this .043" thick gasket delivers superior performance and reliability in high-performance environments.

Advanced Multi-Layer Steel Construction:

• Outer layers embossed and coated on both sides with Viton rubber coating for harsh sealing environments
• Uncoated stainless steel center shim layer provides structural support and can accommodate multiple thickness requirements
• Load Control Embossments (LCE) promote even torque load across sealing surface
• Reduces bore distortion and improves piston ring seal for increased power output

Premium Materials and Engineering:

• Fuel-resistant materials that will not creep, crack, or become brittle
• Engineered to handle high cylinder pressures, extreme temperatures, and demanding load conditions
• Compatible with various surface finishes and sealing requirements
• OE replacement number: 16770-36

Proudly manufactured in the USA with American-sourced materials. Cometic gaskets are trusted by professional racers and engine builders worldwide for championship-winning performance and reliability.