These new gaskets fit 4180 Series 600 CFM Holley 4 barrel carbs with vacuum secondary, 1-9/16" throttle bores and no removable jets in the secondary. This Kit Includes The De-Choke Diaphragm. List #'s 50223^, 50249^, 50252^, 50259^, 50260^, 50262^, 50263^, 50264^, 50265^, 50278^, 50280^, 50305^, 50401^, 50402^, 50403^, 50404^, 50406^, 50408^, 50410^, 50412^, 50414^, 50416^, 50424^, 50426^, 50428^, 80098^, 80112^, 80163^, 80165^, 80166.
