What is the purpose of the Viton coating on the outer layers?

The Viton coating on the outer layers is a heat-resistant rubber material that helps create a reliable seal. It's designed to handle demanding sealing environments, various load conditions, and different surface finishes on the cylinder head and block.

Does this gasket require any additional sealants?

No, Cometic MLS head gaskets are designed to provide maximum sealing performance on their own and do not require additional sealants. Their multi-layer steel construction with Viton coating ensures a tight seal.

What does 'undersized water ports' mean for aftermarket heads?

For aftermarket heads, 'undersized water ports' means the gasket's water passages are slightly smaller than the final desired size. This allows for customization to precisely match the water port dimensions of your specific aftermarket heads, ensuring a proper seal.

Specifications

Brand: Cometic Gasket
Part #: C5401-027
UPC: 191070125790

Cometic Chevrolet Gen-1 Small Block V8 .027in MLS Cylinder Head Gasket - 4.135in Bore

Name: Cometic Chevrolet Gen-1 Small Block V8 .027in MLS Cylinder Head Gasket - 4.135in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevrolet-gen-1-small-block-v8-027in-mls-cylinder-head-ga-t14-805583
Price: 95.21 USD
Availability: BackOrder

$95.21

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Cometic Chevrolet Gen-1 Small Block V8 .027in MLS Head Gasket - 4.135in Bore. Built with multiple stainless steel layers and Viton coating for reliable sealing.

Key Features

Fits a wide range of Chevrolet Gen-1 Small Block V8 engines and compatible vehicles.
Multi-Layer Steel (MLS) construction offers increased strength and resistance to corrosion.
Outer layers are coated with Viton, a heat-resistant rubber material rated up to 482°F (250°C).
Compressed operating thickness is 0.027 inches.
Bore size is 4.135 inches.
Designed for aftermarket heads with undersized water ports for customization.

⚠️ 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

If you're working on a Chevrolet Gen-1 Small Block V8 engine, this Cometic Multi-Layer Steel (MLS) head gasket is a solid option for sealing your cylinder heads. It's designed with a 4.135-inch bore and a compressed thickness of 0.027 inches, making it suitable for a wide range of applications, including those using aftermarket heads where customization of water ports might be needed.

This gasket is built tough, using multiple layers of stainless steel for strength and corrosion resistance. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and varying surface finishes. This construction means you don't need additional sealants, and the gasket can handle the forces between aluminum and cast iron blocks. It's also noted as being suitable for Brodix 12-23 Degree heads.

This gasket fits a broad spectrum of vehicles from the late 70s and early to mid-80s, including popular models like the Chevrolet C/K series trucks, Camaro, and Corvette, as well as GMC trucks. It's a well-built component designed for reliable performance in high-output engines.