These new gaskets fit 4160 series 390-450 CFM Holley 4 barrel carbs with vacuum secondary, 1-7/16" throttle bores and no removable jets in the secondary. LIST # 1737-1^ , 3201^ , 3202^ , 3203^ , 3220^ , 3391^ , 3394^ , 3602^ , 4548^, 8007"^ , 80341^.
