Cometic C9688-HB-018-020 HD Evolution Stock Bore MLS Head Gasket .018" and Base Gasket .020"

The Cometic C9688-HB-018-020 is a high-performance gasket kit designed specifically for Harley-Davidson Evolution engines with stock bore dimensions. This combo kit includes both a Multi-Layer Steel (MLS) head gasket at .018" thickness and a base gasket at .020" thickness, providing a complete top-end sealing solution for your engine build or rebuild.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• Stock bore sizing fits standard Evolution engine cylinders
• Head gasket thickness: .018 inches for precise compression control
• Base gasket thickness: .020 inches
• Heavy-duty design withstands extreme temperatures and pressures
• Engineered to prevent leaks and maintain optimal combustion chamber seal
• Direct replacement for OEM gaskets with performance enhancement

Cometic gaskets are manufactured using advanced materials and processes to ensure consistent quality and reliability. The MLS technology features multiple layers of stainless steel with specialized coatings that adapt to sealing surface imperfections while maintaining exceptional strength. This gasket set is ideal for performance rebuilds, engine refreshes, or replacing worn OEM gaskets on Evolution-powered Harley-Davidson motorcycles.