Cometic C8866 Fiber Cylinder Base Gasket .020" Thick 3.475" Bore

The Cometic C8866 is a high-quality fiber cylinder base gasket designed for Harley-Davidson Big Twin engines. This gasket features a .020" thickness and 3.475" bore diameter, making it ideal for engines requiring precise deck height adjustment and reliable sealing between the cylinder and crankcase.

Key Features:

• Fiber construction with excellent fluid resistance and conformability to irregular surfaces
• .020" thickness allows for precise deck height and compression ratio tuning
• 3.475" bore diameter for proper cylinder fitment
• Maintains strong torque retention across the sealing surface
• Suitable for 1981-2005 Harley-Davidson applications
• Manufactured in the USA to Cometic's exacting quality standards

Cometic's fiber base gaskets are engineered to provide excellent sealability in demanding engine environments while accommodating thermal expansion and minor surface irregularities. The layered fiber material offers superior conformability compared to traditional gaskets, ensuring a leak-free seal under varying operating conditions.