word of caution to you. Unless you have done some serious work on your engine, i would stay away from NO2 (NOS is a brand). It puts a ton of stress on your internals and can cause alot of other issues. As for where to get it installed that depends on the system. A standard small shot fogger system is really a DIY thing but one with Direct port injection would prolly be a shop thing unless you have the time/experience to feel comfortable installing and tuning. Look for a reputable tuner/custom shop in your area. Most can instal pretty easy and quickly. I would check the local laws on it first though. Buddy of mine just got his car impounded for having the system installed and connected while driving on public roads.