deluxe carburetor airflow meter latest rage latest rage 000124 universal pro-sync carburetor synchronizer tool. ideal for fine tuning dual carburetors on dune buggies, vw bugs, karmann ghia, vw bus, motorcycle trikes.<br /><br /> pro-sync is a precision instrument that provides a visual method of balancing the performance of each carburetor in multiple carb set-ups with a high degree of accuracy.<br /> this multiple carburetor synchronizer works with side draft or down draft carburetors. the pro-synchronizer will not restrict airflow and feature an easy to read 1-30 kg/h numbered scale for precise synchronization.