Yeah seems like he was worried about leaning out with the intake. Yes you dont NEED to tune for those simple mods. It will not be dangerous for your motor. You however do NEED a tune if you get a turbo or supercharger or other heavy mods. If you get the tuned PCM from overkill, it does remove speed limiter, shift points higher, skipshifts, better air/fuel ratio's, etc..etc..etc... so you tell me how that wont increase performance.