Anyone had the oppertunity to use both? Is there too much of a difference? Did you install your own FIPK? Was it a pain?
I know there's a bunch of you on this board with the regular K&N filter: did you notice a difference in power and/or milage? Did you notice how/if the vehicle reacted in plain'ol drivability?
I put a FIPK on my Jeep, and the difference was awsome. Even if I didnt consider it a performance upgrade, I would want one just for the way it affected the normal operability/drivability of my Jeep. I was wondering if anyone had this same experience on a Tahoe.

The FIPK is awesome! Better gas mileage too!

did you do it yourself? What kind of gains did you get out of it (power & milage)?