I've ran k & n, spectre and just about everything on the various jeeps I've owned, both old and new, and never managed to see much of a difference. They sure look nice and it is an easy upgrade. I still have k & n set ups on the 66 and 04 jeeps though. I did it, I'll leave them on. I guess, though, maybe now that I think about it, my son can swap in a cold air kit later and whine about the PO who cut up the fender well like a moron!
We did a few minutes to get the air cleaner in:
While my daughter was at gymnastics and my son was mowing the neighbor's yard for jeep money, I hit up Pull N Save and score a few goodies for the intake. A Grand Cherokee's intake hose and an older Cherokee's intake hose extension!
They'll need to soak and get cleaned up a bit before we can do the installation.
I kept an intake off a JK that is now no longer needed, so to craigslist it'll go.
I'll just call all that phase 2.whatever.