These new gaskets fit 4160 Series 390-450 CFM Holley 4 barrel carbs with vacuum secondary, 1-7/16" throttle bores and non removable jets in the secondary. List #'s 1736-A^ , 1737-A^ . Holley Rebuilder Carb Rebuild Kit For 390-450 CFM Vacuum Secondary With One Power Valve & Internal Needle & Seat.
