I'm pretty sure it's just the stock engine. When I bought it, I was getting one of two of them the guy had. I paid 250 for it, but then he offered me the other one for 150, and my dad wanted to get one. So I had been mistaken some how because the guy had one that was pretty well entirely stock, and one that was upgraded. I ended up choosing the stock one, thinking it was the one that was all tricked out, then we get there and I realize I ended up with the stock one. So anyway, we get there and buddy offers us all of his RC gear for 550, extra wheels, tools, temperature reader, parts, a traxxas stampede that needs a servo controller I think, and a fuyma (?) Blackfoot it's like from the 80s or something, that needs a little TLC as well..ahh makes sense, yeah that one was plastic geared, what engine are you running/plan to run?