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.