mine was pretty much bullet proof with aluminum front a-arms, bearings, and atomic bb motor. idk exactly how fast it is but it has great speed for such a little car.
I think they were tested at like 9 or 10 mph in stock form. I like the micro trucks. IMO the only improvement they require right off the bat is the steering "rods"
i enjoy mine alot. great for running around the house or garage. i did a few small mods to mine and just run it. i added bearings, and flipped the wheels around for better handleing. its pretty fun stock.