Carburetor Metering Block Secondary Conversion Kit for Dual Inlet Vac-Sec Carbs ProformFor dual inlet vacuum secondary carburetors to replace the original metering plate with a billet metering block. Kit includes all necessary gaskets for conversion. Avaliable in Black. NOTE: This conversion will require a longer dual feed line. Sold as one kit. Product Details: Engine Carburetor Metering Block Kit Secondary Conversion Upgrade Kit Replaces Original Metering Plate On Dual Inlet Vacuum Secondary Carburetors Made from Billet Aluminum Black