I'd be REAL careful using nitrous...I'm not sure if the stock fuel system is up for it, maybe different ECM, Holes for injectors in your intake system, etc. It could still be pretty pricey!

At least it's easy to tell if the nitrous system was working improperly...you'll have localized pains in and around the right hip pocket, and your engine will fit loosely into a 5 gallon bucket!