This complete set suitable for 998 and 1275cc Mini’s and Mini Cooper (S) as well as other A-series engines (e.g.midget, sprite, ADO16) Professionally rebuild carb setup using the original rebuild kit from Burlen fuel system with all new jets, seals and gaskets. Fitted on a AEG 573 manifold and part number FZX3052. HS2’s have a diameter of 1 ¼ “