MR GASKET ALUMINUM CARBURETOR SPACER KIT, ALUMINUM, NATURAL FINISH -- Legal for sale or use on race vehicles which may never be used on highways; 1 in. thickness; For ported four-hole manifold design or carburetor style; Includes studs, washers, nuts, and gaskets; Increases power and performance; Designed to fit the standard Holley and Carter bolt pattern; Made of precision die cast aluminum for optimum durability; With Mr. Gasket's limited 90-day warranty.