Cometic C9993 Top End Gasket Kit for Harley EVO/Buell 3.875" Bore .040" Head Gasket

The Cometic C9993 MLS (Multi-Layer Steel) top end gasket kit is engineered specifically for Harley-Davidson Evolution and Buell engines with a 3.875-inch bore size. This complete head and base gasket kit delivers superior sealing performance for high-performance and racing applications.

Kit Specifications:

• Bore Size: 3.875 inches
• Head Gasket Thickness: .040 inches (compressed)
• Base Gasket Thickness: .018 inches AFM (Aluminum Foam Material)
• Multi-Layer Steel (MLS) head gasket construction for maximum durability
• Complete head and base (H&B) gasket set included

Key Features:

• MLS Technology provides superior thermal resistance and combustion sealing
• AFM base gaskets offer excellent torque retention and reusability
• Precision-manufactured to OEM specifications with performance enhancements
• Ideal for engine rebuilds, big bore conversions, and performance applications
• Compatible with both stock and modified cylinder heads

Cometic gaskets are trusted by professional engine builders and racers worldwide for their ability to withstand extreme cylinder pressures and temperatures. The .040-inch head gasket thickness allows for precise compression ratio tuning when combined with custom pistons or decked cylinders.