Turbo IIs kick major butt. My bro and Dad have Turbo IIs. My dad's has Racing Beat upgrades. If you get an RX-7, go to RacingBeat.com and oogle the upgrades for the RX7. BTW, Racing Beat's complete exhaust system gives you about 59 more HP, and you gotta call and make sure you get their Fuel Cut Control too, if not, the car wont let you run very much boost at all. It's pricey, but worth every penny. I know from experience!