Depends on what you do, it has a performance tune on it from superchips gives the car a good step up from stock running, Also the adjustment tunes for CAI can be purchased from the website for the intake you choose and than it automatically adjust the settings, but if your running stock or slightly stock you can just plug and play the tuner till you get more parts and get it dyno'ed
its for any mustang 05-09 the tuner is 350 new i just want want $150.00 for it best investment for a v6 without it you cant really modify the engine much.