I have removed the resonator and the junk on and in the bottom of the airbox. Would it be worth it to put the CAI on? I'm having this never ending debate on what will make the most difference for the least money. I hear quite a few say they noticed a definite performance gain and others say SOTP wasn't much different with a CAI. I'm about getting down the track faster period. I've also read some put in a manual boost controller, but I don't know much about them, wondering if that actually works and is safe. I've considered the Magnaflow catback, but my wife will kill me if it sounds dramatically louder or ricey. I also probably have just enough for the ATP DP, but would prefer the CPE due to CEL being eliminated.