Cometic C10378-030 MLS Head Gasket 4.310" Bore .036" Thickness 2024+ Harley-Davidson M8 Center Cooled

The Cometic C10378-030 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered for 2024 and later Harley-Davidson Milwaukee-Eight (M8) engines equipped with center-cooled cylinder heads. Designed as a direct OEM replacement or performance upgrade, this gasket delivers exceptional sealing reliability under the thermal and mechanical demands of modern air/liquid-cooled V-twin engines.

Key Specifications:

• Bore Size: 4.310 inches
• Compressed Thickness: .036 inches (0.91 mm)
• Construction: Multi-Layer Steel (MLS)
• Application: 2024+ Harley-Davidson Milwaukee-Eight (M8) center-cooled engines

Key Features:

• Multi-Layer Steel construction provides superior sealing pressure and durability compared to traditional composite gaskets
• Precision-stamped embossment rings ensure consistent, even clamping force around each cylinder bore
• Engineered to accommodate both stock and mildly modified engine builds
• Designed specifically for the center-cooled M8 cylinder head configuration, ensuring proper coolant passage alignment
• Corrosion-resistant steel layers resist the effects of heat cycling and coolant exposure

Cometic Gasket is an industry leader in aftermarket and performance sealing solutions, trusted by engine builders and professional mechanics worldwide. The C10378-030 is manufactured to precise tolerances to meet or exceed OEM specifications for a leak-free seal on your Milwaukee-Eight powered motorcycle.