Holley Tube Type Accelerator Pump Discharge Nozzles - .025" 4087BK The flange is sealed at

The flange is sealed at the manifold with an O-ring

1/8" FPT Female to -4AN Male straight

5-inch x 7

1968-1977 GM A-Body vehicles (Chevy Chevelle

24 in W x 19 in H x 3 in D

Holley Tube Type Accelerator Pump Discharge Nozzles - .025" 4087BK The flange is sealed atA 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". Various styles of nozzles are offered by Holley,