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 HOURS: 11:00 am to 6:00 pm Monday - Friday Eastern Standard Time 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.