Holley /Quick Fuel, 4150/650cfm competition drag racing carburetor, all aluminum light weight double pumper, down leg boosters, 50cc secondary accelerator pump, 50cc accelerator pump, sight glass bowls, mechanical secondary linkage, 4 corner idle, jet extensions with notched secondary nitrophyl float for hard rapid acceleration, viton seals on the idle mixture screws, choke horn milled to increase airflow to 700+ cfm and have great low end throttle response, was totally disassembled, vibratory cleaned and polished in a filtered soap and water solution, top and bottom of the baseplate is resurfaced, thoroughly gone over, new gaskets with new reusable non stick bowl and metering block gaskets, new accelerator pump diaphragms, new power valve, floats are set, tuning calibrations are pre-set, fuel inlets are installed and pressure tested, mounting gasket is included, this carb. is totally rebuilt, is in like new condition and ready to install. all parts are polished or plated, no paint or powder coating, This type of carb. is at home on the street or strip, Ships worldwide, This is an actual photo of the carb. #6