Welcome to Gen Vibe, I hope we can help you pursue your automotive needs. Does your car have an automatic or manual transmission? How many miles on the car? How long have you had it? What are your goals for the car (besides shooting fire).
Please watch this instructional video,
https://www.youtube.com/watch?v=x92Dzl0trhU
The best way to do this is to start with a Turbo car, remove the cats, and tune the car really rich.
Best way to do it with a Vibe is to install a propane tank and lights (that's what they did in FF to make it look the way it did).