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Quick Fuel 1250cfm QFX 4-bbl Carburetor Kit 3-Circuit

Quick Fuel FX-4712K
Easy Kit


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Quick Fuel 1250cfm QFX 4-bbl Carburetor Kit 3-Circuit $1,373.93
1250cfm QFX 4-bbl Carburetor Kit
  • 3-Circuit
  • 1.900" Venturi x 2.125" Throttle Bore
  • Includes carb, fuel log, and fuel pressure gauge

  • Quick Fuel FX-4712K Details


  • Kit includes QFX Carburetor 793-FX-4712, JEGS Fuel Log 555-15601 , and JEGS Fuel Pressure Gauge 555-41010
  • Calibrated for single 4-bbl applications
  • Nitrophyl floats (notched rear) and jet extensions
  • Viton .130" needle & seat

  • Specifications:

    Manufacturer's Part Number:

    For serious drag race applications, all-aluminum Quick Fuel QFX Carburetors were developed with the racer in mind. A distinctive lightweight main body with lengthened venturi offers more mid-range torque, which is great for both throttle stop and bracket racing. Heads-up racers benefit from the raised intermediate system that provides a stronger signal and better flow to the booster venturi.

    QFX Carbs come with all-new billet metering blocks designed for each fuel type: gas, methanol, and E85. Strong and reliable cast aluminum fuel bowls have dual threaded fuel inlets & dual sight glass for simple float level setting. Dedicated floats ensure maximum performance without additional upgrades. CNC'd billet aluminum booster inserts provide refined air entry/exit for improved fuel emulsion resulting in superior combustion (gas carbs have 12 discharge holes compared to the standard 8).

  • Range: 525 to 1450 cfm (some carburetors available in a kit*)
  • Purpose-built for drag racing
  • Hand assembled & engine tested
  • Lightweight aluminum construction
  • Main body with extended venturi for greater mid-range torque
  • Billet metering blocks specific to fuel
  • Cast aluminum fuel bowls
  • Easy float level adjustment
  • Annular boosters
  • CNC-machined billet aluminum booster inserts provide enhanced air entry/exit, improved fuel emulsion, and superior combustion
  • External linkage with four links to choose the amount of primary throttle opening before the secondaries open: Moderate Progressive (25%), Medium Progressive (40%), Full Progressive (50%), and 1:1

    JEGS Easy Kits are designed by JEGS Professionals to help you get all the performance parts you need.

    *Kits include: specified QFX Carburetor, JEGS Fuel Log #555-15601, and JEGS Fuel Pressure Gauge #555-41010.

  • Some parts are not legal for use in California or other states with similar laws / regulations