Standard Main Jet #55 HO122-55 Bases & Lids (Tops) The advanced engineering for the

The advanced engineering for the HEI ultra performance module has been repackaged into a smaller size to fit inside the bowl of the ACCEL electronic breakerless distributors

XP5 provides excellent roller lifter and roller rocker arm protection

Shafts and arms are splined to avert slipping

510 Series Full Flow Tight Radius Push Lock 120° Hose End -6ANBlue Finish

200-03-1MBLKC

Standard Main Jet #55 HO122-55 Bases & Lids (Tops) The advanced engineering for theStandard Main Jet #551 4 32" Thread, . 054" Hole Size (Pair) HO122 55 122 55 These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimetres per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main Jets are flow tested and then stamped with the correct number.