John Deere Original Equipment Thermostat/Gasket Kit - M123434A. Kit includes: (1) M123434 John Deere Original Equipment Thermostat. (1) M113682 John Deere Original Equipment Gasket. Fits the following John Deere models: 2243 Gas Professional Greens Mower, 2500 Greensmower (Gas and Diesel), 2500A Greensmower (Gas and Diesel), 2500B Greensmower (Gas and Diesel), 2500E Greensmower (Gas and Diesel), 2500E Hybrid Greensmower (Gas and Diesel), 345, 4X2 HPX, 4X4 HPX AND 4X4 Trail HPX Gator Utility Vehicle (Gas) ,6X4 Gators, GX345 Lawn and Garden Tractor, HPX615E Gator Utility Vehicle, X520, Z840A Professional ZTrak. These are OEM John Deere parts. Thanks for looking!