On my ranger, I have the k&n 77 seres, I replaced the k&n dust magnet with a cone filter from AEM, just measure the hole at the end of your k&n where it conects and order an AEM that size, mine was 3" diameter, there's not much difference in size between the filters themselves, the diameter at the conecting point is the only real concern. No, you don't have to oil them ever, it's a great product, high quality. I have the AEM intake on my focus st and I'm very impressed with thier quality and it doesn't just whitsle, you can feel the difference. I'm going to replace the k&n intake on my truck with AEM as soon as they have my application. Also want the brute force for my kj, but they only go up to 04 and mine is an 06. I don't know if there was a change or if AEM hasn't updated, or if they haven't gotten carb approval for 05 and 06 yet. K&N is getting a lot of bad PR lately, in test they flow excellent, but don't filter well and thats the whole purpose of the filter. the most recent test was in the november issue of jp mag, AEM amd amsoil did very well.
_________________ 06 jeep liberty 4x4 65th aniver edition
04 ranger xlt sc 4x4, 4.0 sohc, 5-speed, gibson dual sport, cai, udp, bama tune, BFG's, and tru-trac
07 redfire mustang GT, 4.6 3V, 5-speed
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