Cold Air intake

[2010ExplorerEB]

Hello, I have a 10 explorer with the 4.0. I'm turning it into a trail rider and im trying to get some tips to make bigger, faster, an louder

 

[Tech By Trade]

don't get much colder than factory. it sucks right behind the wheel well. now you can get one of those nice hot air intakes that pull right below the hood. Boy they sound good. Almost as useless as a chip. I say almost because they cost a bit less.