Holley 121-28 | Carburetor Accelerator Pump Nozzle

A good selection of accelerator 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, and with less pressure, than a smaller hole. Sizes are stamped on each nozzle. For example, the number 31 indicates that the nozzle hole size is .031-inches. Various styles of nozzles are offered by Holley.

• 0.028 in. Hole Size
• Accelerator Pump Parts
• Accelerator Pump Discharge Nozzle
• Accelerator Pump Discharge Nozzle 0.028 in. Hole Size Tube Type Includes 2 Gaskets
• Tube Type
• Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
• Accelerator Pump Discharge Nozzle; 0.028 in. Hole Size; Tube Type; Incl. 2 Nozzles/4 Gaskets;
• Includes 2 Gaskets