I built my own in take because of the price. One thing that sticks in my mind is the intake air sensor. Most of the aftermarket systems have no provision for reinstalling it. This sensor reading the air intake temp sounds to me like you would want it. My other point on the aftermarket systems that is not addressed is the ability to draw or ram cold air into the engine. I don't remember the ratio of air temp to HP but this is important in building HP. Another point is pressure. If you check out how hard your engine sucks to get its air. A true ramair system will help the turbo out. Even if you have a larger turbo or a wicked wheel. Free HP, fits my budget.