# Cometic Pontiac 400/428/455 V8 .140in MLS Cylinder Head Gasket - 4.200in Bore

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.

-   The embossed outer layers of the gaskets meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes
-   The center or shim layer is an uncoated stainless steel layer which can be varied to accommodate multiple thickness requirements
-   Requires less clamp load creating less bore distortion
-   Conforms load distribution across the sealing area
-   Embossed Outer Layers Coated w/Viton

This Part Fits:

Year

Make

Model

Submodel

1975

Buick

LeSabre

Base

1975

Buick

LeSabre

Custom

1975

Oldsmobile

98

Luxury

1975

Oldsmobile

98

Regency

1975

Oldsmobile

Custom Cruiser

Base

1975

Oldsmobile

Custom Cruiser

Panel

1975

Oldsmobile

Delta 88

Base

1975

Oldsmobile

Delta 88

Royale

1968-1978

Pontiac

Bonneville

Base

1976-1978

Pontiac

Bonneville

Brougham

1968-1970,1978

Pontiac

Bonneville

Safari

1968-1978

Pontiac

Catalina

Base

1971-1972

Pontiac

Catalina

Brougham

1968-1978

Pontiac

Catalina

Safari

1968-1970

Pontiac

Catalina

Ventura

1968-1970

Pontiac

Executive

Base

1968-1970

Pontiac

Executive

Safari

1968-1969

Pontiac

Firebird

350

1969

Pontiac

Firebird

350 HO

1968-1969

Pontiac

Firebird

400

1968-1979

Pontiac

Firebird

Base

1970-1979

Pontiac

Firebird

Esprit

1970-1979

Pontiac

Firebird

Formula

1968

Pontiac

Firebird

HO

1968-1969

Pontiac

Firebird

Sprint

1969-1979

Pontiac

Firebird

Trans Am

1973-1975

Pontiac

Grand Am

Base

1975-1977

Pontiac

Grand LeMans

Base

1975,1977

Pontiac

Grand LeMans

Safari

1968-1974,1976-1977

Pontiac

Grand Prix

Base

1975,1977

Pontiac

Grand Prix

LJ

1975-1977

Pontiac

Grand Prix

SJ

1971-1978

Pontiac

Grand Safari

Base

1971-1974

Pontiac

Grandville

Base

1975

Pontiac

Grandville

Brougham

1968-1973

Pontiac

GTO

Base

1970-1971

Pontiac

GTO

The Judge

1968-1977

Pontiac

LeMans

Base

1972-1974

Pontiac

LeMans

Luxury

1969-1970,1973-1975,1977

Pontiac

LeMans

Safari

1974

Pontiac

LeMans

Safari Luxury

1970-1977

Pontiac

LeMans

Sport

1971

Pontiac

LeMans

T37

1968-1970

Pontiac

Tempest

Base

1968-1969

Pontiac

Tempest

Custom

1970

Pontiac

Tempest

GT

1968-1969

Pontiac

Tempest

Safari

## Details

- **Price:** 349.64 CAD
- **Vendor:** Cometic Gasket
- **Type:** Head Gaskets

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 349.64 CAD | In stock |

## Images

- Photo - Primary
- Photo - Primary
- User 9
- Installation Instructions
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/cometic-pontiac-400-428-455-v8-140in-mls-cylinder-head-gasket-4-200in-bore)
> Updated: 2026-06-26