The info you guys have is completely wrong. If you run rich you WILL have less power. If you lean out your motor you WILL have more power. Dumping in more fuel is like throwing water on a flame. You need the correct ratio of fuel and air to get the most power. And these cars already run rich, at least the MP3 does. Trust me, putting in more fuel will not give you more power unless you have lots more air like from a turbo or a shot of nitrous. And no, this mod is not like running a shot of nitrous. N2O is an oxidizer, meaning is is like putting lots more air into your motor, if you don't have the fuel to match, you will blow your motor or do lasting damage to it. This is why lots of people that are using nitrous are blowing up their motors. If you choose not to believe me, that's fine, but you will have a $2000 mechanic bill soon.