Cylinder Head Gasket

The HP shim technology increases clampload around the combustion chamber, thereby increasing the sealability of the head gasket around the open deck block.

Additional Information

Chevrolet Gen-I Small Block V8 .040in. MLS Cylinder Head Gasket; 4.185in. Bore; 18/23 Degree Heads; Without Steam Holes

Part Type

Engine Cylinder Head Gasket

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

• Conforms load distribution across the sealing area
• Embossed Outer Layers Coated w/Viton
• Requires less clamp load creating less bore distortion
• The center or shim layer is an uncoated stainless steel layer which can be varied to accommodate multiple thickness requirements
• The embossed outer layers of the gaskets meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Head Gaskets, MLS, 4.185 in./106.30mm Bore, Round Shape, 0.040 in. Thick, Multi-Layer Stainless Steel, 18/23 Degree Heads, Chevy, 4.3-6.6L, Each

Cometic MLS head gaskets are constructed from multiple layers of stainless steel for strength and contain load-controlled embossments that conform load distribution across the sealing area. This creates an exceptional seal by requiring less clamp load—resulting in less bore distortion. The stainless steel outer layers utilize FKM (Viton®) rubber coating, a high-temperature and chemical-resistant polymer. A topcoat of PTFE aids in resistance to fret and increased cold sealing. MLS head gaskets are available for most aftermarket cylinder heads; as with all of Cometic's MLS head gaskets, no sealants or re-torque is required.