Originally Posted by JonB

A good tune will run you around $300-$500 unless you know someone that does it on the side. A dyno tune usually cost a bit more usually add another $100 or so for the dyno time. You will almost always gain from a tune but with minimual mods it may not be worth it at this point. It can depend on the tunner as well. Some tunners will charge you full price the first time than any additional tuning you need down the road they will only charge you a small fee. This is something to ask if you plan on a tune now. I would personally wait till you atleast get some headers and some gears put in.