PatStab,
The K&N filter debate has gone on for decades in all aspects of motor travel. There's been numerous tests, in closely monitored conditions, that several times, have proved they do nothing for engine performance. On the motorcycle forums I belong to, they all hate them and know that todays engines, especially the highly tuned Fuel injected ones, depend on stock settings and reactions in order to function correctly.
The Jeep forum people I've been involved with have tossed them in favor of the paper units. The paper units are very well made and work quite well and, are reasonably priced. I'm not an expert, I've had them in motorcycles, motor homes, cars, trucks, and, as of yet, I've never had any inkling of engine performance enhancement and as far as any "improved gas mileage" claims, that too was never recognized.
Many folks are happy with them. I for one, never was. They, by far, to me, are not anywhere worth the money they charge for them. Your choice.
Scott
Scott and Karla SDFD RETIRED2004 Itasca Horizon, 36GD Slate Blue 330 CAT
2011 GMC Sierra 1500 Ext Cab 4x4 Toad
2008 Caliente Red LVL II GL 1800 Goldwing KI60ND