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Primary Billet Metering Block Standard Calibration W/ Spark 1850,3310,4776,4777,4778,4779


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$84.48   Suggested Retail
$76.03   Your Price
Estimated shipping date: 02/10/2021
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Billet Metering Block Standard Calibration fits most 1850, 3310, 4776, 4777, 4778, 4779 Holley® model numbers. Has spark advance provision. 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. Standard calibration for out of box performance - designed to fit most real world street & strip carburetors. Simply add your jets and power valve to complete the installation.


  • Adjustable idle feed restrictions - 0.031"
  • Adjustable power valve channel restriction - 0.053"
  • 3 pre-drilled 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 TypeReplacement Metering Block
WarrantyLimited 90 Day
Part Number34-8QFT



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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