i'm going with tokicko shocks but not sure if I should stick with the stock springs i dont have my new wheels yet going with some 18s so i dont want to buy the springs without knowing how low it will look, how low do u guys with 18s have?

 

The real idea is to keep the same or similar overall wheel/tire diameter (which is why you have less sidewall as you go to a larger rim).

So, the gap for a 16" or an 18" wheel will be roughly the same. That being said, I would recommend either the RSR Race Springs or the Eibach springs.