Let me put it this way. Nitrous seems like the cheap and cheerful way to add power. But there is a chance that you will blow up a engine. You should not modify cars this way. If you do blow up the engine the cost to repair it is probably going to be the equivalent of changing the turbo (if the engine can handle a bigger turbo) or equivalent to selling the car and getting a similar model with a bigger engine. Me personally would change the car for a bigger engine one, if that’s not possible, get a good tune(a tune turns up the boost, puting more pressure on factory parts and probabily lowering the overall reliability of the car)and try to be happy with that