CAI's are GREAT, if you are going to maintain it. Don't have a CAI that looks like it's last service was when Benny Hill went off the air. I just use a hi-flo, because my butt-dyno cannot tell the diff? Trust me, my butt dyno is calibrated and state certified, though on a N/A motor the diff in the intake temputure from HI-Flo to CAI is really not noticed on a "Buttox-Dynometer" and unless you are really BUILDING a motr where the slightest change in intake temputure could greatly affect the engine's output. . . Both are good for @ 10hp gain, CAI maybe 2 more added to this, I simply say it's a matter of what you like, because by time the TQ gets it only a REAL dyno can see/feel the gains?