I have a 2 step on my GTO...
As for being negative.... yes.... you drive an aveo, make it look nice and leave the flames for big turbo'd cars. Its not an $800 job.. spark plug and a button that makes you run rich then... boom flames out the tail pipe. I've seen this kit on TV before it was on an old school big v8 car and wasn't really impressive. I think you have a better chance of melting the car.