That car is without a doubt a X6!!! My frien was driving his today and he said the best difference is the acceleration. There will be a Pro spec kit with ti screws and rear alluminum hubs. Box says US version with carbon towers. I was curious as to why I seen some kits with cnc towers. Not to many options to buy here for this car. For $850 car I guarantee the makers of Kyosho will come out with option parts. It never fails!!! Dont know what parts because it also looks pretty complete. Next year will make for some good racing for sure with all the cars out. Funny after all these years Mugen had changed their air filter to a 2 stage. They have been using the same filter since '93(Athlete). Always worked though. Only part I can see carried over from the X5 is the steering slider.