Cometic C9739 Cylinder Base Gasket 4.125" Bore .020" Twin Cam

The Cometic C9739 is a high-performance Single-Layer Steel (SLS) cylinder base gasket engineered specifically for Harley-Davidson Twin Cam engines with a 4.125-inch bore. This precision gasket features a .020-inch thickness and is sold as a pair for complete cylinder coverage.

Key Features:

• Single-Layer Steel (SLS) construction for reliable sealing
• 4.125-inch bore diameter for Twin Cam applications
• .020-inch thickness for precise compression control
• Embossed and Viton-coated on both sides for superior sealing
• Manufactured from premium fuel-resistant materials
• Designed to withstand harsh sealing environments and load conditions
• Made in the USA with American-sourced materials
• Sold as a pair (2 gaskets included)

Cometic gaskets are engineered to provide superior performance and durability, utilizing advanced manufacturing processes and high-quality materials that resist creeping, cracking, and brittleness. The Viton coating ensures optimal sealing across various surface finishes and operating conditions, making this an ideal choice for performance builds and engine rebuilds.