Cometic H5023040S MLS Cylinder Head Gasket for Honda CG-Series Engines

The Cometic H5023040S is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered for Honda CG-series engines. Designed with the performance enthusiast in mind, this gasket delivers superior sealing reliability for both stock rebuilds and modified applications.

MLS Construction Technology:

• Multi-layer stainless steel design — comprised of multiple embossed layers of stainless steel for exceptional strength and rebound characteristics
• 0.040" compressed thickness — precision-controlled thickness for accurate compression ratio tuning
• Viton-coated outer layers — embossed outer layers are coated on both sides with FKM (Viton®) fluoroelastomer rubber, heat resistant to 250°C / 482°F
• Uncoated stainless steel center (shim) layer — provides structural rigidity and can be varied to accommodate thickness requirements
• No sealants required — installs dry; no re-torque necessary after initial break-in
• Reduced bore distortion — load-controlled embossments distribute clamping force evenly across the sealing surface
• Corrosion resistant — stainless steel construction resists coolant, oil, and combustion byproducts

Compatibility Notes:

• Compatible with aluminum head-to-aluminum block and aluminum head-to-cast iron block configurations
• Requires a smooth, flat, and true head and deck surface finish of 50 Ra (roughness average) or finer for proper sealing
• Not compatible with o-ring or receiver groove setups

Cometic is a globally recognized leader in high-performance gasket technology, trusted by championship-winning teams across professional and amateur motorsports. The H5023040S reflects Cometic's commitment to precision sealing solutions for demanding engine applications.