Cometic H1174SP6040S MLS Cylinder Head Gasket .040" Thick

The Cometic H1174SP6040S is a Multi-Layer Steel (MLS) cylinder head gasket engineered for high-performance Honda H-series engine applications. Built to withstand extreme cylinder pressures, this gasket delivers a reliable, long-lasting combustion seal without the need for additional sealants or re-torquing after break-in.

Key Features:

• Multi-Layer Steel (MLS) Construction: Comprised of multiple layers of stainless steel for superior strength, rebound characteristics, and corrosion resistance
• Viton-Coated Outer Layers: Outer stainless steel layers are embossed and coated on both sides with a fluoroelastomer (Viton) rubber material, heat resistant to 250°C (482°F)
• 0.040" Compressed Thickness: Precision thickness for proper compression ratio management in performance builds
• No Sealant Required: Installs dry — the integrated Viton coating acts as the sealing agent; additional sealants can hinder performance
• Reduced Bore Distortion: MLS design promotes even torque load distribution across the sealing surface, minimizing bore distortion
• Compatible with Aluminum-to-Aluminum and Aluminum-to-Cast Iron Applications: Withstands the shearing forces created between dissimilar metals
• Surface Finish Requirement: Requires a smooth, flat deck surface of 50 RA (roughness average) or finer for optimal sealing

The Cometic H1174SP6040S is designed for the performance enthusiast who demands a proven OEM-replacement and upgrade solution. No re-torque is necessary after installation, making it a straightforward choice for engine builders seeking a durable, high-integrity head gasket.