Feature●HEIGHT: 1” for some street and most racing applications●4150 SQUARE BORE MOUNTING FLANGE for Holley, Edelbrock, AFB, Carter, Quick Fuel, Proform, and other carburetors and throttle bodies●4-HOLE DESIGN for single or dual plane intake manifolds●INCLUDES spacer, 2 gaskets, and mounting hardware●MADE FROM PHENOLIC PLASTIC for weight savings and improved insulation from heatDescription