Home / Shop / Cometic Chevy Gen1 Small Block V8 .056in MLS Cylinder Head Gasket - 4.185in Bore - Round Bore

Cometic Chevy Gen1 Small Block V8 .056in MLS Cylinder Head Gasket - 4.185in Bore - Round Bore

SKU: CGSC15439-056

Head Gaskets

CG Head Gaskets...

Cometic Chevy Gen1 Small Block V8 .056in MLS Cylinder Head Gasket - 4.185in Bore - Round Bore

Cometic Gasket

Cometic Chevy Gen1 Small Block V8 .056in MLS Cylinder Head Gasket - 4.185in Bore - Round Bore

SKU: CGSC15439-056

Head Gaskets

CG Head Gaskets...

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Description

The Cometic MLS gasket is comprised of three to five layers of stainless steel. Cometic uses stainless steel for increased strength, its ability to rebound and resist corrosion. The outer layers of the gasket are embossed and coated on both sides with a Viton rubber material designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes. The Viton coating is heat resistant to 250°C or 482°F.

Product Overview

Features and Benefits

Coated On Both Sides w/Viton

Product Details

Description:	Chevrolet Gen-1 Small Block V8 Cylinder Head Gasket
Engine Make/Size:	Chevrolet Small Block Gen I
Part Number:	cgsC15439-056
Position:	N/A
Prop 65 (C, R or CR):	CR
Prop 65 - Short Label:	Prop_65.jpg
Prop 65 Warning Label:	Prop_65.jpg
Prop 65 Yes/No:	Yes
Title:	Cometic Gasket Automotive Chevrolet Gen-1 Small Block V8 .056 in MLS Cylinder Head Gasket, 4.185 in Bore, 18/23 Degree Head, Round Bore, Without Steam Holes
WARNING CA Proposition 65 Message:	The state of California has determined that certain chemicals used in the manufacture of this product have been known to cause cancer and birth defects. For more information; visit www.p65Warnings.ca.gov
WARNING CA Proposition 65:	Yes

Part Type

Engine Cylinder Head Gasket

Data: v4.2 - Upd: 2026-10-14 00:05:36

Features

Coated On Both Sides w/Viton
Conforms load distribution across the sealing area
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

Specifications

Product Attributes - Brand: Cometic
Product Attributes - Manufacturer's Part Number: C15439-056
Product Attributes - Part Type: Head Gaskets
Product Attributes - Product Line: Cometic MLS Head Gaskets
Product Attributes - UPC: 191070461188
Product Attributes - Bore (in.): 4.185 in.
Product Attributes - Bore (mm): 106.680mm
Product Attributes - Gasket Material: Multi-layer stainless steel
Product Attributes - Compressed Thickness (in.): 0.056 in.
Product Attributes - Compressed Volume (cc): 12.623cc
Product Attributes - Lock Wire: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Fits 18 and 23 degree heads. Gasket has round bores and no steam holes.

Reference Information

Brand Name/s	Cometic Gasket
StreetFX SKU	cgsC15439-056
SFX Item ID	4169987
Supplier Item Code	4169987
Manufacturer SKU	C15439-056
Manufacturer UPC	191070461188
Alternative References	CGT-C15439-056, Gen1, .056in, 4.185in