Rebuild Kit for 1955-1957 Ford Power Pack, Police Spec. 292" 312" 2 Carbs, and for 1955-1956 Lincoln 341" 368", and for 1954-1955 Mercury 256" 292", and for 1955-1957 Thunderbird 292" 312" Fits Holley 4000 Carburetor ("teapot") - MFG Code & Model: H 4 2140/4000 Carburetor Type: Holley 4000 4 BBL Works with carburetor OEM# List: R-957-1A R-957-2A R-991-1A R-991-2A R-1074A R-1074-1A R-1074-2A R-1074-2AAS R-1075A R-1075-1A R-1075-2A R-1161A R-1161-1A R-1161-2A R-1161-2AAS R-1162A R-1162-1A R-1162-2A R-1163A R-1163-1A R-1163-2A R-1164A R-1164AS R-1164-1A R-1164-2A R-1268A R-1434A R-1434-AS R-1437A R-1437AS Lincoln OEM List: R-992-1A R-1076A R-1076-1A R-1076-2A R-1076-2AAS R-1094-1A R-1094-2A R-1094-3A R-1094-4A R-1094-4AAS Works with Mercury OEM# List: R-803-5A R-803-6A R-803-7A R-803-7AS R-803-7AAS R-804-5A R-957-1A R-957-2A R-991-1A R-991-2A R-1040A R-1074A R-1074-1A R-1074-2A R-1074-2AAS R-1075A R-1075-1A R-1075-2A Thunderbird OEM List: R-997-1A R-997-2A R-998-1A R-998-2A R-1077A R-1077-1A R-1077-2A R-1077-2AS R-1078A R-1078-1A R-1078-2A R-1078-2AS R-1161A R-1161-1A R-1161-2A R-1161-2AAS R-1162A R-1162-1A R-1162-2A R-1163A R-1163-1A R-1163-2A R-1164A R-1164-1A R-1164-2A R-1434A R-1434AS R-1437A R-1437AS Made in USA by Walker Products. Stock photo shown, actual parts may vary. (Secondary Diaphragm NOT included) This is a complete carburetor rebuild, tune-up kit that comes with all necessary parts for a standard overhaul job. This is the kit professional carburetor rebuilders are using. New in a sealed package from a reputable national supplier. This kit does NOT come with a Secondary Diaphragm.