I'm thinking about getting a K&N FIPK for my 2001 Mustang GT Convertible, but I've heard somewhere (not sure if it's correct information) that the MAF (mass air flow?) sensor should be changed as well. After installing an FIPK, is there any other changes that need to be made? I heard some stories about CAI's causing some complications later in the future, though I'm not sure about the validity of these stories I've heard. Any inputs on this?