Hello dear screwdriver have the following problem search the order number of Fiat.Fiat does not give it out On my head is 502285001 on the internet I find under this number only used, believe that it is the cast number of one dealer fits the one head and the other the other of the same manufacturer only the final number is another. Maybe they fit yes both but have different original number maybe it knows itself really well from engine code F1AE3481D 2.3 131ps Year of construction 2013 Once it is also about the exhaust gas form Euro 4 or 5 Unfortunately I have a camper and it is not an exhaust gas form a worn With the specified article it is also always different times the exhaust gas form or the other and nobody can tell me the differences .. and before I buy the wrong head maybe someone knows the problem and is smart