Holley Accelerator Pump Tune-Up Kit, 20-12 Cams w/.35 Nozzles

Product Summary

Universal Fit

• A good selection of pump discharge nozzle sizes is indispensable to the proper tuning of the accelerator pump system
• The nozzle hole size determines the rate of fuel discharge. A larger hole will "shoot" the fuel at a faster rate with less pressure than a smaller hole
• Sizes are stamped on each nozzle. For example the number "31" indicates the nozzle hole size is .031"
• The two styles offered are Tube Type (121-40, 121-42, and 121-45 also include 2 hollow nozzle screws) and Straight Type
• Includes eight assorted pump cams to fine-tune your accelerator pump shot