its similar but def not the same. little things makes a big difference. when taking it apart, the sleeve is similar to the VZB but the crank looks different. it turns far more RPMs, i never had to give it over half throttle and it was still pulling all the engines, even SPEEDs. if you like the VZB or Speeds then you will love this engine.

i never like the VZB, i had a few and they all felt weak, this one reminds me of the JP modified one, but i still think it has a little more than it, it might just be putting the power to the ground, but it gets going in a hurry.