Holley, 4150/4781/850cfm competition drag racing carburetor, double pumper, progressive roller secondary linkage, 50cc secondary accelerator pump, 4 corner idle, jet extensions with notched secondary float for hard rapid acceleration, tygon seals on the idle mixture screws, choke horn milled to increase airflow to 900+ cfm and have great low end throttle response, was totally disassembled, vibratory cleaned and polished in a filtered soap and water solution, 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. This carb. is at home on the street or strip, All parts are polished or plated, no paint or powder coating, Ships worldwide, This is an actual photo of the carb. listed. #72