Chevy Small Block Perimeter-Bolt Cork Valve Cover Gaskets

• Cork construction seals perimeter-bolt valve cover mating surfaces

• 3/16" thickness gasket material for consistent sealing under clamp load

• Fits Chevy Small Block perimeter-bolt valve covers, 265–400 CID

• Sold as a pair — complete gasket set for both valve covers

The Chevy Small Block Perimeter-Bolt Cork Valve Cover Gaskets seal the mating surface between perimeter-bolt valve covers and the cylinder head to help prevent oil leaks. Cork construction at 3/16" thickness is built to match the perimeter-bolt gasket rail pattern, so the bolt pattern and sealing surface need to match this application for proper installation.

This gasket set fits Chevrolet Small Block perimeter-bolt valve cover applications across the 265–400 CID range, commonly used in restoration, street performance, and truck builds. Sold as a pair, covering both valve covers in a typical installation.

Verify bolt pattern, sealing surface, and gasket material before installation, and replace worn gaskets during valve cover service or a fresh installation.

Applications
Fits Chevrolet Small Block perimeter-bolt valve cover applications, 265–400 CID. Commonly used in restoration, street performance, and truck builds using this engine family.

Gasket Specifications
Cork construction, 3/16" thickness, sold as a pair.

What does this gasket fit?
This gasket set fits Chevrolet Small Block Gen I perimeter-bolt valve covers used on 265, 267, 283, 302, 305, 307, 327, 350, and 400 CID engines.

What is this gasket made from?
These gaskets are manufactured from 3/16-inch thick cork, providing a reliable seal between the valve cover and cylinder head.

How many gaskets come in this set?
This kit includes two valve cover gaskets, providing a complete set for both valve covers.

Will this gasket fit center-bolt valve covers?
No. This gasket is designed specifically for perimeter-bolt valve cover applications and is not compatible with center-bolt valve covers.

What's the difference between this and the rubber perimeter-bolt gasket?
This version is made from 3/16-inch thick cork, while the alternative version uses rubber with a steel core. Both fit the same Chevrolet Small Block Gen I perimeter-bolt valve cover applications, but the materials differ to suit individual sealing preferences.

When should I replace this gasket?
Replace the gasket whenever servicing or removing the valve covers, or if the existing gasket shows signs of wear, cracking, compression, or oil leakage.

Does this gasket affect emissions compliance?
No. This product does not affect vehicle emissions and is not subject to emissions compliance regulations.