Cometic C9878 MLS Head Gasket Bore Thickness - 4.000 030

The Cometic C9878 is a high-performance Multi-Layer Steel (MLS) head gasket engineered specifically for 4.000" bore S&S and TP (Twin Power) cylinder applications on Harley-Davidson Evolution Big Twin and Sportster engines. This precision gasket features a .030" compressed thickness and is designed for use with solid dowel pins.

Key Features:

• Multi-Layer Steel construction with embossed stainless steel layers for superior sealing
• 4.000" bore diameter - compatible with S&S and TP cylinders
• .030" compressed gasket thickness
• Solid dowel pin configuration
• Viton-coated for enhanced heat and chemical resistance
• Made in the USA from American-sourced materials

Cometic MLS gaskets are trusted by professional engine builders and performance enthusiasts worldwide for their reliability under extreme pressure and temperature conditions. These gaskets provide exceptional sealing performance in high-compression, high-performance applications where traditional composite gaskets may fail.