the ring and pinions are different then the x1 and the upper arms are alittle longer and most of the plastic has a little bit more glass in It. The only parts that wouldnt fit the x1 chassis are the braces, tank and radio tray. U can easly convert ur x1 to an x2 all u would need is the chassis, unis, ring and pinions gears, and radio tray . U can probly go on to ebay here in a few months and get all that from a kit breaker pretty cheap.