Valve Cover Gasket Set Buick V8 400/430/455

The MAHLE ORIGINAL/CLEVITE Valve Cover Gasket Set for Buick V8 400/430/455 engines is a precision-engineered pair designed to seal valve covers against combustion chamber pressure and prevent oil seepage. Built with 0.250-inch cork and fiber composite material, this gasket set meets OEM specifications for classic and muscle car restoration, rebuild, and long-term engine reliability on these displacement variants.

The cork-fiber construction provides the flexibility needed to conform to cast-iron valve cover surfaces while maintaining consistent compression across the gasket face. This material composition resists oil degradation and thermal cycling common to V8 engines operating at sustained temperatures. The 0.250-inch thickness is sized specifically to work with Buick big-block valve covers without shimming or modification, ensuring proper bolt torque distribution and preventing oil weep that can accumulate on engine blocks over time.

This gasket pair is essential for anyone rebuilding or maintaining a Buick V8 with 400-cubic-inch, 430-cubic-inch, or 455-cubic-inch displacement. Whether restoring original muscle cars, performing routine valve cover maintenance, or addressing existing oil leaks around the valve covers, quality OEM-specification gaskets like this set prevent contamination of engine oil and protect the surrounding engine bay. MAHLE ORIGINAL gaskets are manufactured to strict tolerances and are a factory-trusted solution for Buick engine applications.