Chrysler Big Block Rubber Valve Cover Gaskets

• Rubber-with-steel construction seals Chrysler B/RB big block valve cover surfaces

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

• Fits Chrysler B and RB big block V8s, 383 through 440 CID

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

The Chrysler Big Block Rubber Valve Cover Gaskets seal the mating surface between Chrysler B/RB big block valve covers and the cylinder head to help prevent oil leaks. Rubber-with-steel construction at 3/16" thickness is built to match the B/RB gasket rail pattern, so bolt pattern and sealing surface must match your specific application for proper installation.

This gasket set fits the Chrysler Big Block "B" V8 (6.3L/383 and 6.6L/400 CID) and Chrysler Big Block "RB" V8 (6.8L/413, 7.0L/426 — commonly called the "426 Wedge" — and 7.2L/440 CID). 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 the Chrysler Big Block "B" V8 (383, 400 CID) and "RB" V8 (413, 426 "426 Wedge," 440 CID).

Gasket Specifications
Rubber with steel construction, 3/16" thickness, sold as a pair.

What does this gasket fit?
This gasket set fits Chrysler Big Block B-Series V8 engines, including 383 CID and 400 CID, and RB-Series V8 engines, including 413 CID, 426 Wedge, and 440 CID applications.

Does this fit the 426 Hemi?
No. This gasket is designed for the 426 Wedge (RB engine family) and is not compatible with the 426 Hemi, which uses a different valve cover design and gasket.

What is this gasket made from?
These gaskets are manufactured from rubber with a steel core, measuring 3/16 inch thick, for excellent durability, gasket retention, and sealing performance.

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

Do the B and RB engines use the same valve cover gasket?
Yes. The Chrysler B-Series and RB-Series Big Block engine families share the same valve cover gasket rail pattern, allowing this gasket set to fit both engine families.

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.