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