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.

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.

Features and Benefits:

• Adjustable idle feed restrictions - 0.033 Inch
• Adjustable power valve channel restriction - 0.049 Inch
• 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
• Sold individually

Requires QFT 6-32 thread bleeds for modification

Details:

• Grade Type: Performance
• Material: Steel
• Qty: 2
• Warranty: Manufacturer's Limited 90 Day Warranty