Cometic C9811 Copper Base Gasket Harley Big Twin - 005 1986-Up 2-Pack

The Cometic C9811 is a premium copper base gasket designed for Harley-Davidson Big Twin engines ranging from 833cc to 1200cc (1986 and later). This 2-pack of .005-inch thick gaskets provides precision control over cylinder deck height, allowing engine builders to fine-tune piston-to-head squish clearance for optimal performance.

Key Features:

• Manufactured from high-quality copper for superior heat dissipation and sealing
• .005-inch thickness allows precise deck height adjustment
• Fits Harley-Davidson Big Twin engines 833cc-1200cc (1986 and up)
• Sold as a convenient 2-pack for complete engine builds
• Ideal for performance engine builds and custom compression ratio tuning
• Provides excellent conformability to cylinder and crankcase surfaces

Cometic copper base gaskets are essential components for performance engine builders who demand precise control over engine geometry. The copper construction offers excellent thermal conductivity and reusability, making them a preferred choice for high-performance and racing applications. Made in the USA with premium materials.