Fabricated from performance CRC (core-reinforced-composite), Edelbrock Valve Cover Gaskets provide excellent sealing integrity and conformability for easy installation. The multi-layer construction has two highly compressible, high rubber content, fiber-reinforced outside layers which are chemically bonded to a high strength composite core. This unique core-reinforced construction has a radial strength to resist high vacuum or blow-out conditions. Edelbrock valve cover gaskets are an Edelbrock product.