This synchrometer instrument is designed to indicate the airflow very precisly, even at idle, but also to withstand rough handling and excessive air flow at high R.P.M.s. Does not impede airflow any more than a standard air filter would. This Sync. is desinged for 48mm and larger carburetors. Also see part number 000748A to adapt to smaller carburetors.
Carburetor Sync Tool, Snail Style, Fits 48mm and Larger, German, Sold ea.