Description Product Description NEW Quick fuel 650 CFM double pumper black diamond series Supercharger carburettors Calibrated for pump fuel only Features: Blower referenced Modified pumps and main circuits for supercharged applications Mechanical secondaries for better throttle response dual feed fuel inlets Calibrated for excellent street/strip performance 1 boost reference port, 1 full vacuum, and 2 PCV port Performance upgrade mildly modified to highly modified vehicles Universal calibration for easy bolt-on performance Great for 2×4 set-ups where a larger CFM is needed Adjustable float level list QBDQ-650 Sold as a pair – LAST PAIR LEFT Linkage kits are also available