Tuning/calibration Kit for Double Pump Carburetor HolleyThis tuning kit contains a selection of main jets, pump nozzles and power valves, in popular sizes, all contained in a handy and durable, compartmentalized plastic case. Ideal for track side tuning, this kit provides a quick and easy way to accomplish your carburetor tuning with the correct parts. In addition, the parts case allows you to keep parts organized and readily at hand. A handy parts guide is affixed to the inside case cover. Numbers