You'd get a little more noise (resonator reduces intake noise), and the filter would be enough if you're not trying to tune.
I can second the avoid injen part. My short term fuel trim is -10-20% off, so I'm running pretty lean at times
I wish I knew more about fuel trims. I actually know very little about the data I get back from the tuning device.
From my flawed memory, it's usually negative single digits, but never more than +- 15.
Hondata does supply a dropdown menu that includes the Injen CAI, so chances are they've...