Cometic C9874-030 HD Base Gasket 4.125" Bore S&S EVO .030" Rubber Coated

The Cometic C9874-030 is a high-performance cylinder base gasket designed for Harley-Davidson Evolution engines equipped with S&S 4-1/8" (4.125") bore cylinders. This premium gasket features a .030" compressed thickness and utilizes Cometic's rubber-coated steel construction for superior sealing performance.

Key Features:

• Rubber-coated steel construction provides excellent conformability to sealing surfaces
• 4.125" bore size specifically engineered for S&S cylinder applications
• .030" compressed thickness for precise deck height control
• Reinforced gasket material resists blow-out and withstands high cylinder pressures
• Premium fuel-resistant materials won't creep, crack, or become brittle over time
• Designed for Harley-Davidson Evolution engines with aftermarket S&S cylinders

Cometic gaskets are manufactured to exacting tolerances and constructed from high-quality materials that ensure long-term reliability and durability. The rubber coating allows the gasket to conform to slight surface irregularities while maintaining excellent sealing properties under extreme heat and pressure conditions.