I have K&N Filters in all of my vehicles including the motorhome. I purchased the Cold Air Intake Kit from Camping World. I had a problem with an installation of my Inverter so I was able to get it just above their cost as a good will jesture. MPG increase much, doubtful, but I will say from a performance side the gas pedal is more responsive. I noticed the difference when climbing up long hills. Before my speeds would drop off rapidly and I'd have to really push down on the pedal to get up the hill. I'm then turning around 4200-4400 RPM, after the install, same hill, speeds maintained longer and I'm climbing at 2800-3200 RPM. Best part is that engine isn't screaming trying to get up the hill. It has to have some positve results in fuel mileage, minimal-yes but being able to pass other trucks on the hills - Priceless!!
This observation was done on Rte 83 in Pennsylvania. I travel this way quite often. I used to dread it for the simple fact of climbing those hills really puts a strain on the engine and my heart as well. Now no big deal! I'm sure there will be some eye rolling
about this post but I'm convinced the Cold Air Intake with the K&N, to me, is worth the investment. I paid $335 and did the install myself. I can't put a price on peace of mind. Also No Charge for the Eye Roll I posted for you!!!