What is the compressed thickness of this head gasket?

The compressed operating thickness of this Cometic MLS head gasket is 0.036 inches. This measurement is important for ensuring proper compression ratios and valve-to-piston clearance.

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 the use of additional sealants. Their multi-layer construction and Viton coating create a robust seal.

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

The Viton rubber coating on the outer layers is heat-resistant up to 482°F (250°C). It's designed to meet the demands of harsh sealing environments, load conditions, and surface finishes, ensuring a reliable seal.

Specifications

Brand: Cometic Gasket
Part #: C5273-120
UPC: 191070123673

Cometic Chevy Gen-1 Small Block V8 .120in MLS Cylinder Head Gasket - 4.200in Bore

Name: Cometic Chevy Gen-1 Small Block V8 .120in MLS Cylinder Head Gasket - 4.200in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevy-gen-1-small-block-v8-120in-mls-cylinder-head-gasket-t14-806192
Price: 249.06 USD
Availability: BackOrder

$249.06

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Cometic Gen-1 Small Block V8 MLS head gasket with 4.200in bore. Built for high output engines, it offers maximum sealing performance.

Key Features

Fits Chevrolet Gen-1 Small Block V8 engines.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are coated on both sides with heat-resistant Viton rubber.
Compressed operating thickness is 0.036 inches.
Features a 4.200-inch bore size.
Includes valve pocketed bore and steam holes for improved performance.

⚠️ 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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Will it fit your car?

About this part

Product Details

Cometic Gasket is well-known for making dependable sealing solutions, and their Multi-Layer Steel (MLS) head gaskets are a prime example. This particular gasket is built for Chevrolet Gen-1 Small Block V8 engines, featuring a 4.200-inch bore and a compressed thickness of 0.036 inches. It's designed to handle the demands of high-output engines, providing a strong seal without needing additional sealants.

What makes these MLS gaskets stand out is their construction: multiple layers of stainless steel give them increased strength and the ability to rebound, resisting corrosion and shearing forces, especially when mating aluminum heads to cast iron blocks. The outer layers are coated on both sides with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes. The center layer is stainless steel, allowing for different thickness options to suit specific engine builds. This gasket also includes valve pocketed bores and steam holes, contributing to its overall effectiveness.

This gasket fits a wide range of vehicles, including popular models like the Chevrolet C10, Camaro, and GMC C1500, from the early 1980s through the mid-1980s. It's a solid option for rebuilding or upgrading your engine's top end.