Cometic Buick 3800 Series II/III V6 .070in MLS Cylinder Head Gasket - 3.840in Bore - RHS

SKU: CGSC5721-070

Head Gaskets

CG Head Gaskets...

Cometic Buick 3800 Series II/III V6 .070in MLS Cylinder Head Gasket - 3.840in Bore - RHS

Cometic Gasket

Cometic Buick 3800 Series II/III V6 .070in MLS Cylinder Head Gasket - 3.840in Bore - RHS

SKU: CGSC5721-070

Head Gaskets

CG Head Gaskets...

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Description

MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel

Product Overview

Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.098". Cometic MLS (Multi-Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two materials. MLS gaskets have increased strength because they are comprised of multiple layers of stainless steel; which also creates the ability to rebound and resist corrosion. The outer layers are embossed and coated on both sides with Viton (a flour elastomer rubber based material that is heat resistant to 250 C/ 482 F). Viton is designed to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes. The center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements.

Features and Benefits

Embossed Outer Layers Coated w/Viton

Product Details

Description:	Buick 3800 Series II/III V6 Cylinder Head Gasket
Engine Make/Size:	Buick 3.8L
Part Number:	cgsC5721-070
Position:	Right
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 Buick 3800 Series II/III V6 .070 in MLS Cylinder Head Gasket, 3.840 in Bore, RHS
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 00:05:05

Features

Conforms load distribution across the sealing area
Embossed Outer Layers Coated w/Viton
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: C5721-070
Product Attributes - Part Type: Head Gaskets
Product Attributes - Product Line: Cometic MLS Head Gaskets
Product Attributes - UPC: 00191070023300
Product Attributes - Bore (in.): 3.840 in.
Product Attributes - Bore (mm): 97.536mm
Product Attributes - Gasket Material: Multi-layer stainless steel
Product Attributes - Compressed Thickness (in.): 0.070 in.
Product Attributes - Compressed Volume (cc): 13.285cc
Product Attributes - Lock Wire: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Designed to fit the passenger side head.

Reference Information

Brand Name/s	Cometic Gasket
StreetFX SKU	cgsC5721-070
SFX Item ID	4170517
Supplier Item Code	4170517
Manufacturer SKU	C5721-070
Manufacturer UPC	191070023300
Alternative References	CGT-C5721-070, .070in, 3.840in