What is the purpose of the Viton coating on the head gasket?

The Viton coating on the outer layers of the gasket is a heat-resistant rubber material. It helps create a reliable seal between the cylinder head and engine block, especially in high-output engines that generate significant heat.

Do I need to use any sealant with these Cometic head gaskets?

No, these Cometic Multi-Layer Steel (MLS) head gaskets are designed to provide maximum sealing performance on their own and do not require any additional sealants for installation.

What is the difference between MLS and traditional head gaskets?

Multi-Layer Steel (MLS) gaskets, like this Cometic model, are made from multiple layers of stainless steel for increased strength and durability. They are better at resisting corrosion and can handle the demands of high-output engines compared to older, single-layer designs.

Specifications

Brand: Cometic Gasket
Part #: C5817-075
UPC: 191070141189

Cometic GM Gen-V/VI Big Block V8 .075in MLS Cylinder Head Gasket - 4.320in Bore

Name: Cometic GM Gen-V/VI Big Block V8 .075in MLS Cylinder Head Gasket - 4.320in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-gen-v-vi-big-block-v8-075in-mls-cylinder-head-gasket-4-t14-806676
Price: 152.35 USD
Availability: BackOrder

$152.35

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Cometic GM Gen-V/VI Big Block V8 .075in MLS head gasket with 4.320in bore. Ensures a solid seal for high-output engines.

Key Features

Fits a wide range of Chevrolet and GMC Gen-V/VI Big Block V8 vehicles.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are coated with Viton, a heat-resistant elastomer rated up to 482 F.
Compressed operating thickness is 0.075 inches.
Bore size is 4.320 inches.
Designed for high-output engines and does not require additional sealants.

⚠️ 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

The outer layers of this Cometic head gasket are coated with Viton, a heat-resistant rubber material rated up to 482 degrees Fahrenheit. This is important because it helps create a reliable seal between your GM Gen-V/VI Big Block V8 engine block and cylinder heads, even under demanding conditions. These Multi-Layer Steel (MLS) gaskets are built with multiple layers of stainless steel, giving them increased strength and the ability to rebound, which helps them resist corrosion and maintain their seal over time.

Because they're made from multiple layers of stainless steel, these gaskets are well-suited for use with both aluminum and cast iron blocks, and they can handle the shearing forces that can occur between different metals. They are designed to provide maximum sealing performance for high-output engines and don't require any additional sealants, making installation more straightforward. The center layer is stainless steel and can be varied to achieve different thickness requirements, with this particular gasket set at a compressed operating thickness of 0.075 inches and a bore size of 4.320 inches.

This gasket fits a wide range of Chevrolet and GMC trucks from the early to mid-1990s, including models like the Chevrolet C1500 and GMC K2500 Suburban. It's a solid option when you need a dependable seal for your big block V8 rebuild.