HOLLEY 3160/4150+4160 Vacuum Secondaries, Outside Needles. Carburettor Service Kit.GENUINE = Made in USA. And will fit 4BBL Carburettors:- 390,450,470,570,600,670,750,770cfm models, With List No: 1850,8007,9776,80457,3310+ 80508 from 1968 until 2023.
