Latest Rage 000124 Universal Pro-Sync Carburetor Synchronizer Tool. Ideal For Fine Tuning Dual Carburetors On Dune Buggies, VW Bugs, Corvairs, Karmann Ghia, VW Bus, Motorcycle Trikes. 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.This Multiple Carburetor Synchronizer Works With Side Draft...