3. Free flowing Air Intake System

While the performance oriented air intake system takes a lot of flack for being just for street racers, this is certainly not the case. Many vehicles will benefit from a free flowing intake filter within some type of box to help shield the incoming air from under hood temperatures. Some after-market intake systems can do more harm than good, however, so it is always important to make sure that you are using a system which has been designed and tuned to function properly with your vehicle.