For sure. I was skeptical of claims that a CAI alone (no header or exhaust) would radically change the sound, but the change from outside the car is noticeable, and inside, when the go pedal is pushed, wow. Needless to say I'm very pleased with each of the mods.
2009 Vista Blue SE Coupe
FSWerks CAI, H&R Springs, FSWerks ECU, Sound Ordnance P-57 speakers, remote start