Valve cover gaskets made from Mr. Gasket’s Ultra-Seal high-density cork and rubber blend, designed to provide long-lasting sealing under heat and oil exposure. A black latex coating is applied to the exterior surface to help the gasket conform to small flange irregularities and reduce the chance of seepage. The material is formulated to swell slightly when exposed to hot engine oil, creating a positive, uniform seal. These .187-inch-thick gaskets are sold as a pair and fit both 1987–2002 Gen I small block Chevrolet engines and 1992–1997 Gen II LT-series engines. Suitable for OE replacement, high-performance street builds, drag racing, and oval-track use.