This tuning kit is composed of a selection of accelerator pump hardware components including pump diaphragms, pump nozzles, pump cams and related parts. Contained in a convenient plastic parts case, this kit has all that is required to properly tune and calibrate the accelerator pump circuit(s) for your street, drag or circle track car or tow vehicle. A handy parts guide is affixed to the inside case cover to assist in reordering components when necessary.36-184 Kit Contents: Pump Discharge Nozzles- 2 of each size:25,28,31,32,35,37,40,42,45,47,50,52Pump Discharge Needle Valve: QTY of 6Pump Check Valve: QTY of 630cc Pump Diaphragm- QTY of 650cc Pump Diaphragm- QTY of 6Pump Discharge Nozzle Screw- QTY of 4Pump Cam Lock Screw- QTY of 6Pump Discharge Nozzle Gasket-QTY of 40Pump Cam Assortment- 2 of Each Cam, QTY of 20