Quick Fuel Q-Series Carburetor 650 CFM DRAG 2X4 Supercharger 500020151 Prevents Small Block Chevy cast

Prevents Small Block Chevy cast aluminum valve covers from vibrating loose in competition

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Quick Fuel Q-Series Carburetor 650 CFM DRAG 2X4 Supercharger 500020151 Prevents Small Block Chevy castQ Series Carburetor 650 CFM DRAG 2X4 Supercharger. Quick Fuel Technology's ready to run 2x4 Blower Carburetors will deliver the air and fuel your engine needs to make race winning power. QFT's 2x4 blower carbs feature shortened throttle levers for clearance. An external vacuum reference tube has been added for the power valve to connect to the intake manifold with a hose. This allows the power valve to see only positive pressure at Wide Open Throttle,