Aeromotive
        
                    
            
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                387.631BHD
            
            
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                12 GPM Hex Drive Mechanical Fuel Pump. Designed to feed serious EFI and Carbureted engines, gasoline, ethanol or methanol. The 12 GPM Hex Drive Pump must be driven by a 3/8" female hex, allowing the pump to be driven from your camshaft or off the back of...