Cometic H1340SPN063C CG MLS Cylinder Head Gasket 0.063in

The Cometic H1340SPN063C is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered for Honda H-Series engines. With a compressed thickness of 0.063 inches (1.60mm), this gasket is well-suited for built motors requiring additional combustion deck clearance or compressed ratio management compared to thinner stock-replacement options.

Key Features:

• Multi-Layer Steel (MLS) Construction — comprised of multiple embossed layers of proprietary high-temperature coated and uncoated stainless steel for maximum strength and rebound
• Viton-Coated Outer Layers — outer stainless steel layers are embossed and coated on both sides with fluoroelastomer (Viton) rubber, heat resistant to 250°C (482°F), sealing against combustion gases, coolant, and oil
• 0.063 in. Compressed Thickness (1.60mm) — thicker profile ideal for performance and forced-induction applications requiring adjusted compression ratios
• No Re-Torque Required — MLS design promotes even clamp load distribution across the sealing surface, reducing bore distortion without the need for re-torquing after break-in
• No Sealants Required — installs dry; the Viton micro-seal coating handles fluid sealing against the head and block mating surfaces
• Compatible with Aluminum-to-Cast Iron and Aluminum-to-Aluminum Pairings — the MLS composition withstands the shearing forces common in mixed-material engine builds

Cometic is a leading manufacturer of performance engine sealing solutions, trusted by championship-winning teams across professional and amateur motorsports worldwide. The H1340SPN063C delivers race-proven reliability for Honda H-Series engine builds requiring a thicker head gasket specification.