Cometic GM Small Block Aluminum/Rubber Exhaust Port Cover Set - 18 Degree Heads

SKU: CGSC5258

Header and Exhaust Manifold Gaskets

CG Exhaust Gaskets...

Cometic Gasket

Cometic GM Small Block Aluminum/Rubber Exhaust Port Cover Set - 18 Degree Heads

SKU: CGSC5258

Header and Exhaust Manifold Gaskets

CG Exhaust Gaskets...

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Description

Exhaust Cover Set

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.

Additional Information

GM Small Block Aluminum/Rubber Exhaust Port Cover Set; 18 Degree Heads

Part Type

Exhaust Manifold Gasket Set

Product Overview

Additional Application Notes
• Material: AR Compressed Thickness: .19
• Small Block Aluminum/Rubber; 18 Degree Heads
• Small Block Aluminum/Rubber; 18 Degree Heads Material: AR Compressed Thickness: .19

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

Data: v2 - Desc: v4.2 - Upd: 2026-11-07 18:55:56

Data: v4.2 - Upd: 2026-11-07 21:29:49

Features

Asbestos Free
Corrosion resistant
Maintains a torque set
Will not burn through or push out
Withstands different combinations of cylinder head and manifold materials

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Description:	GM Small Block 18 Degree Exhaust Port Cover Set
Material:	Armor Clad
Part Number:	cgsC5258
Thickness:	.190in
Title:	Cometic Gasket Automotive GM Small Block Aluminum/Rubber Exhaust Port Cover Set, 18 Degree Heads

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s	Cometic Gasket, Cometic, Cometic Gasket Automotive, Cometic Gasket Marine, Cometic Gasket Powersports, COMETIC GASKETS, Cometic Powersport Gaskets
StreetFX SKU	cgsC5258
SFX Item ID	4171902
Accounting SKU	cgs-C5258
Manufacturer SKU	C5258
Manufacturer UPC	191070545703
Alternative References	C5258, CGT-C5258