Fel-Pro 1605 Chevrolet big block valve cover gaskets measuring .156" thick. Packages as 2 per set. Fel-Pro Fel-Coprene synthetic rubber gaskets can offer a long life than cork-rubber gaskets. Generally, a quick drying contact adhesive should be used to bond the gasket to the valve cover before installation. Fel-Pro 1605 Chevrolet big block valve cover gaskets Fel-Pro-1605 We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page. We will not ship to freight forwarding - expediting companies. PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.