corrado nitrous help

ok well i have a 1990 corrado g60 4 cyclinder, I want to put nitrous on it I have a stock motor with the stock supercharger on it, now my buddy said i can get a dry nitrous system whatever that is for a small boost like 35-50 hp without having to change anything on my engine, like timing belt, supercharger, pistons stuff like that so my question is can a buy a nitrous system with low hp gain and just put it on without doing anything else? and would any of you know where I could get one off the interent or in the orlando, FL area?

Nitrous express has a universal system for Imports that would be you best bet also I would not go with a shot bigger than 35 and do you have a manual because if you do you should go with a micro switch setup rather than a button its alot easier to use