Cometic C10321-045 MLS Head Gasket Pair 4.375" Bore .045" Thickness

The Cometic C10321-045 is a pair of high-performance Multi-Layer Steel (MLS) cylinder head gaskets designed for engines with a 4.375-inch bore diameter and .045-inch compressed thickness. These gaskets are engineered to deliver superior sealing performance in demanding performance and racing applications.

Multi-Layer Steel Construction:

Each gasket features multiple layers of precision-engineered stainless steel. The outer layers are embossed and coated on both sides with Viton, a fluoroelastomer rubber-based material that withstands extreme temperatures up to 482°F while providing exceptional sealing against coolants, oils, and combustion gases. The center stainless steel shim layer can be varied in thickness to achieve the desired final gasket thickness of .045 inches.

Key Features:

• 4.375-inch bore diameter for precise fitment
• .045-inch compressed gasket thickness
• Sold as a pair for V-configuration or opposed cylinder engines
• Multi-layer stainless steel construction for superior strength and durability
• Viton-coated embossed outer layers for optimal sealing
• Excellent rebound characteristics and corrosion resistance
• Ideal for aluminum-to-cast iron or aluminum-to-aluminum applications
• Withstands shearing forces from thermal expansion differences
• No re-torque required after installation
• Reduced bore distortion through even torque load distribution

Cometic gaskets are manufactured using state-of-the-art design software and precision manufacturing processes, ensuring consistent quality and reliability for street performance and racing applications. The MLS design promotes even clamping force across the entire sealing surface, making these gaskets an excellent choice for high-compression and forced-induction engines.