Sorry do not no? I do not think some of then comes with the SS? But you should be able to find out on HPI web site. The parts we are talking about are some of the ones (as I put a lot in it) I put in my MT Racer Kit before I ever put fuel in it. It is not a MT2 but the best of the original MT that came with a lot of the hop ups right out of the box that the stander MT did not. This is the best I could fine for my MT Racer. I would get an 18SS but I have so much in my MT Racer with little run time on it (which I plain on changing shortly) so I am going to stick with it for a while. I have up grade to some MT2 parts. The new gear set others are talking about in this form that seems know one has yet are cheaper.