The Edelbrock Intake Manifold Gaskets are the perfect companion for the Edelbrock intake manifolds and cylinder heads. They feature an exact port match for maximum flow and performance. A perfect seal is assured because all of the Edelbrock gaskets have a silicone bead around each port opening. It has a port height and port width of 2. 000 and 1. 200 respectively with a thickness of 0. 060. An intake manifold is a system of passages which conduct the fuel mixture from the carburetor to the intake valves of the engine. The gaskets provide optimum sealing in intermittent operating temperatures up to 400 degrees Fahrenheit. The gasket maintains a perfect seal under pressure and temperature changes.