Air Bleed Assortment Kit for Model 4150 HP & 4500 Dominator Carburetors HolleyThis air bleed kit is a must when track tuning a Holley 4500 Dominator or Model 4150HPTM carburetor for maximum performance. The kit includes four (4) each of the following bleed sizes: 23 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, & 69 78. Air bleeds are contained in a plastic case that is designed to be read with the top open, keeps them separated and makes them easily accessible. Features and Benefits: Includes four (4) of each various