Originally Posted by stroke11
I've done some reading and it seems that almost everyone that have change intakes has lost mileage. I wanted to get the airaid but I saw a guy say he lost 2 mpg with it. Is this really happening to all brands if so doesn't it seem the aftermarket kit is hurting your truck. More air should mean better combustion resulting in more power and less fuel burned?
1st Cold Air Intakes do not bring in more air. More meaning Volume. There are supposedly supposed to bring in "colder air", colder air means better performance which is the reason most high performance cars have intercoolers.
2nd it all depends on the cold air kit. Most performance car cold air kits are a joke. Many of them have chrome pipes (which attracts more heat the the factory plastic) and are open to the engine carpatment where all the engine heat is. Factory air cleaners and pipes are usually aimed or pick up air from behind the head lights or under the fender (where the coldest air is).
3rd What is wrong with the factory set up? All these companies never say anything but cold air kit adds HP and MPGs. They never say why. These new vehicles are so finely tuned and such tight tolerances that taking something off like a air cleaner normally does harm to performance.
If you want to pick up MPGs I would say custom tuning is your best bet.