Cometic C10258 Milwaukee-Eight Complete Engine Gasket Kit 4.500" Bore .040" MLS Head Gasket

The Cometic C10258 is a complete engine gasket kit designed for Harley-Davidson 2017 and newer Milwaukee-Eight engines with a 4.500" bore and .040" MLS cylinder head gasket, suitable for 139 cubic inch big bore applications. This comprehensive kit includes all necessary gaskets and o-rings for a complete engine rebuild or refresh.

Key Features:

• Multi-Layer Steel (MLS) construction comprised of multiple embossed layers of proprietary high temperature coated and uncoated stainless steel with active combustion seals
• Designed to provide maximum sealing performance for high output engines and requires no additional sealants or re-torquing
• Load-controlled embossments conform load distribution across the sealing area for optimal sealing
• Resistant to corrosion and able to withstand high heat (250 deg C) and load conditions
• 4.500" cylinder bore diameter with .040" compressed head gasket thickness
• Note: On oil cooled heads, oil holes must be welded

Cometic's MLS gaskets require less clamp load and create less bore distortion than conventional gaskets, making them ideal for performance builds and high-compression applications. This complete gasket set provides everything needed for a professional engine seal on Milwaukee-Eight V-twin engines.