What is the compressed thickness of this head gasket?

This Cometic MLS head gasket has a compressed operating thickness of 0.036 inches. This measurement is taken after the gasket has been installed and torqued to spec.

What makes this gasket suitable for high-output engines?

The Multi-Layer Steel (MLS) construction provides enhanced strength and durability. The Viton rubber coating on the outer layers ensures a robust seal capable of withstanding the pressures and temperatures found in high-output V8 engines.

Can this gasket be used with both aluminum and cast iron engine blocks?

Yes, this gasket is designed to work effectively with both aluminum heads on aluminum blocks and aluminum heads on cast iron blocks. The MLS design helps manage the shearing forces that can occur between dissimilar metals.

Specifications

Brand: Cometic Gasket
Part #: C5433-075
UPC: 191070126377

Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .075in MLS Cylinder Head Gasket - 4.570in Bore

Name: Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .075in MLS Cylinder Head Gasket - 4.570in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevrolet-mark-iv-gm-gen-v-vi-big-block-v8-075in-mls-cyli-t14-803735
Price: 141.79 USD
Availability: BackOrder

$141.79

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Cometic Chevrolet Mark-IV, GM Gen-V/VI Big Block V8 cylinder head gasket. .075in thickness, 4.570in bore. Direct fit.

Key Features

Fits 1965-1986 Chevrolet and GM vehicles with Mark-IV, Gen-V/VI Big Block V8 engines.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are coated with heat-resistant Viton rubber for reliable sealing.
Compressed operating thickness is 0.036 inches.
Bore size is 4.570 inches.
Features undersized water ports on aftermarket heads for custom fitting.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

When you're rebuilding the top end of your Chevrolet Mark-IV or GM Gen-V/VI Big Block V8, getting the head gasket right is crucial for a solid seal. This Cometic Multi-Layer Steel (MLS) head gasket is built for high-output engines and is designed to provide maximum sealing performance without needing any extra sealants.

This gasket uses multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing conditions and different surface finishes. The center layer is stainless steel and can be varied to achieve different thicknesses; this particular gasket has a compressed thickness of 0.036 inches and a bore size of 4.570 inches, with undersized water ports that allow for customization when using aftermarket heads. It's well-suited for combinations of aluminum heads with aluminum or cast iron blocks, as it can handle the shearing forces that can occur between different metals.

This gasket fits a wide range of vehicles, including models like the Chevrolet Impala, Corvette, and C10 Pickup from various years. It's a well-built option for those looking for reliable sealing in their performance V8 build.