These Proflow main jets control fuel flow into the metering system. They are rated in flow capacity "cubic centimeters per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Proflow Main jets are flow tested and then stamped with the correct number.

Features:

  • Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500 or Holley based carburettors
  • Sizes from 64-99
  • 1/4-32 Thread
  • #93 Jet size
  • Standard Main Jet
  • All Proflow jets are sized by actual flow.

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