What does a 'top-end' gasket kit include?

A top-end gasket kit typically includes the gaskets needed for the cylinder heads, valve covers, and intake manifold. This specific kit is designed for the top portion of your Pontiac 455 Big Block V8 engine.

What is a Multi-Layer Steel (MLS) head gasket?

MLS head gaskets are made from multiple layers of steel with a special coating. They are known for their strength and ability to seal under high pressure and temperature, making them a popular choice for performance engines.

Can I buy a bottom-end gasket kit to match this top-end kit?

Yes, Cometic offers matching bottom-end gasket kits. Purchasing both the top-end and bottom-end kits will allow for a complete engine rebuild.

Specifications

Brand: Cometic Gasket
Part #: PRO1010T-4300-040
UPC: 191070372149

Cometic Pontiac 455 Big Block V8 Top End Gasket Kit - 4.300in Bore - .040in MLS Cylinder Head Gasket

Name: Cometic Pontiac 455 Big Block V8 Top End Gasket Kit - 4.300in Bore - .040in MLS Cylinder Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-pontiac-455-big-block-v8-top-end-gasket-kit-4-300in-bore--t14-803632
Price: 235.21 USD
Availability: BackOrder

$235.21

On Backorder

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

Cometic Pontiac 455 Big Block V8 Top End Gasket Kit - 4.300in Bore - .040in MLS Cylinder Head Gasket. Top End Gasket Kit.

Key Features

Fits a wide range of vehicles including Pontiac Bonneville, Catalina, and Firebird models from 1970-1976.
Includes a Multi-Layer Steel (MLS) cylinder head gasket.
Cylinder head gasket is sized for a 4.300-inch bore.
Cylinder head gasket has a thickness of .040 inches.
StreetPro kits are designed for budget-minded street-rodder rebuilds.
Kit includes necessary gaskets and seals for the top end of the engine.

⚠️ 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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About this part

Product Details

Cometic Gasket is known for making well-built sealing solutions for a wide range of engines. This StreetPro top-end gasket kit is put together for builders who need all the essential gaskets and seals for a Pontiac 455 Big Block V8 rebuild, without breaking the bank. It includes a Multi-Layer Steel (MLS) cylinder head gasket specifically sized for a 4.300-inch bore and a thickness of .040 inches, perfect for many performance applications.

This kit is designed to cover the top end of your engine, meaning it has the gaskets you'll need for the cylinder heads and valve covers. Cometic uses quality gasket materials in their StreetPro line, including MLS, AFM, Aramid Fiber, and Armor Clad, ensuring a solid seal for your engine. If you're looking to do a full engine overhaul, you can also pick up a matching bottom-end kit from Cometic to complete the job.