All of our new parts are aftermarket replacements. Compatible with FIAT Tractor(s) 45-66, 45-66DT, 55-46, 55-46DT, 55-56, 55-66, 55-66DT, 55-76, 55-76DT. Compatible with FIAT Engine(s) 165 (Diesel), 8035.06 (Diesel). Replaces FIAT OEM nos 1930253, 1940070. Compatible with Ford Tractor(s) 3830. Compatible with New Holland Tractor(s) 3010S. Contains all gaskets necessary for a complete engine overhaul. All States Ag Parts Item No.