Metering Block - Race-Oriented Calibration - Primary - Gaskets Included - Aluminum - Purple Anodized - Holley 4150 Carburetors - Each

Metering Block - Primary - Gaskets / Vent Baffle - Aluminum - Red Anodized - Holley 4150 / Quick Fuel Carburetors - Kit

Metering Block - Primary or Secondary - Gaskets / Vent Baffle - Aluminum - Red Anodized - Holley 4150 / Quick Fuel Carburetors - Each

Metering Block - Primary - Gaskets / Vent Baffle - Aluminum - Red Anodized - Holley 1850 / 3310 / 4776 / 4777 / 4778 / 4779 Carburetors - Kit

Metering Plate - Secondary - Conversion to Main Jets - Center Pivot - Gasket Included - Aluminum - Red Anodized - Holley Center Pivot 4160 Carburetors - Each

Carburetor Base Plate - Complete - Aluminum - Purple Anodized - Holley / Proform 650-800 CFM Mechanical Secondary Carburetors - Each