Cometic C10346-040 MLX Head Gasket 4.250" Bore .040" Pair

The Cometic C10346-040 is a pair of Multi-Layer-Xtreme (MLX) head gaskets designed for high-performance Harley-Davidson Milwaukee 8 engines. Featuring a 4.250" bore diameter and .040" compressed thickness, these gaskets are engineered to handle extreme cylinder pressures from turbocharged, supercharged, high compression, and nitrous applications.

Multi-Layer-Xtreme Technology:

• Extra "stopper" fold-over layer provides a torque limiting surface that prevents yielding of the combustion seal
• Proprietary high-temperature coatings combined with embossments create a micro seal for fluids against head and block surfaces
• Multiple layers of stainless steel construction for maximum strength and durability
• Viton rubber coating on outer layers resists heat up to 482°F and harsh sealing environments

Key Specifications:

• Bore Size: 4.250" (4.270" inside diameter for oil and coolant passages)
• Compressed Thickness: .040"
• Quantity: Pair (two gaskets included)
• Fits air/oil cooled and Twin Cooled heads

MLX head gaskets require no special machining and install like standard MLS head gaskets, yet provide superior sealing performance essential for power adder modifications. No retorque necessary after installation. Made in the USA.