FTP S55 N55 N54 Thermostat kit V2 135i 335i 535i ( Thermostat parts+ thermostat cover )If you would like to control the oil temperature of your engine between 194F (90c) to 230F (110c) this is the best solution for your carIt perfect integration with N54 and N55 engineAfter market product tuning upgrade about the E9X 335i most of Thermostat parts is standard on 2008+ models, optional on 2006~2007 models. Only 2006~2007 models of the vehicles listed to the right must check what factory valve They have before ordering 2006~2007 : type07