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QFX 3 Circuit Billet Metering Block 5 Eml

PART# 34-77QFT

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$149.00   Suggested Retail
$133.95   Holleydays Price
Estimated shipping date: 11/30/2020
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QFX 3 Circuit Billet Metering Block 5 Emulsion - Fully Adjustable - Designed for QFX, and Holley® 4500 style carburetors. Our billet aluminum metering blocks are machined to very strict tolerances then anodized for protection and good looks. CNC cut from premium aluminum and filled with precision parts, these blocks provide the ultimate platform for your performance carburetor. Adjustable calibration for out of box performance - initially calibrated for most race carburetors. Simply add your jets to complete the installation.


  • Completely adjustable 3rd circuit (discharge and pickup)
  • Adjustable idle feed restrictions - comes with 0.037"
  • 5 adjustable emulsion channels
  • Non-stick gaskets
  • Exclusive QFT positive retaining vent baffle
  • Stainless steel idle mixture screws with nylon seals.
  • Detailed installation instruction sheet
  • Requires QFT 6-32 thread bleeds for modification


BrandQuick Fuel
Emission Code5
Product TypeMetering Block Kit
WarrantyLimited 90 Day
Part Number34-77QFT



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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Warranty Information

Limited 90 Day: See Details
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       X  Holleydays 2020 20% off and DD
       X  Holleydays 2020 20% off and DD