Billet Metering Block
Fully Tunable for Street/Strip applications. Retains original vacuum passage for distributor vacuum advance. Idle feed restriction, emulsion and power valve channel restriction tunable with screw-in brass restrictions. Calibration upgrade without sacrificing street vacuum provisions.
This will fit any standard Holley two or four barrel carburetor (except 3 circuit Dominator and alcohol calibration carburetors)Billet Secondary Metering Block
Use this metering block to convert from a metering plate to metering block. This kit enables you to convert your single or dual inlet carburetor from a secondary metering plate to a secondary metering block. Kit includes a longer transfer tube and longer fuel bowl screws. Features adjustable idle feed restriction. Billet Metering Block Conversion Kit
For all Holley Double Pumper carburetors. Allows you to upgrade to billet metering blocks with a more aggressive calibration essential with engine modifications. Have tunable idle feed restrictions. Will also facilitate a conversion to four corner idle (some additional modifications to carburetor required).
This kit will replace the original metering blocks with a more aggressive ''race oriented'' calibration. Adjustable idle feed restriction enables you to fine tune the idle, not possible with press in restriction carburetors.
