The reason I want to go with that NOS kit is because it is built especially for my car and my car only. It is an automatic switch and it comes with all the safety features. I do trust these guys because they all run them on there car. I am very afraid to NOS because I dont want to hurt my engine. They only they work on is cars like mine. So I think I should spend the extra money and get a safer kit. They do have there turbo Sunfire running 23lbs of boost. Damn thats fast. As low as they got it is 10.97 in the 1/4. That is damn fast for a car that weighs 2800lbs.