Accelerator Pump Discharge Nozzle Check Needle, Accelerator Pump Discharge Nozzle Check Needle; Replacement; For Holley 4150/4160/4500 Series Carburetors;, Replacement Part, Includes 2 Gaskets, Replacement pump discharge needles for all Holley 4150, 4160, and 4500 series carburetors., CrbAclPmpNzz, Carburetor Accelerator Pump Nozzle