K_N filter
Posting Guru
Joined: Jul 2006
Posts: 1,737
Likes: 0
From: Republic of Texas
Try this . . .
You will find through some searching in this and the Super Duty thread that the stock Donaldson filter provides the as much air flow as neded, even for performance upgrades, and that after markets will only hurt your engine. Some dealers also have issue with warrenties if they come into play to.
Look through the threrads and see . . .
Look through the threrads and see . . .
Posting Guru
Joined: Mar 2006
Posts: 1,798
Likes: 2
From: SoCal, SD CO. East
Another newbie K&N question?
If you want to spend $$, buy some gauges. If you want to know about something, try searching the forums a little first by clicking the 
button at the top of the page. You'll get more information that way.
Welcome to the forum!
button at the top of the page. You'll get more information that way. Welcome to the forum!
Posting Guru
Joined: Aug 2007
Posts: 1,131
Likes: 2
From: Hernando Ms.
I have an airaid, don't know if its any better but I havn't heard any good about k&n on our trucks. Mine was on it when I bought it so I will probley keep it like it is. yea spend the money on gauges.....looking up info on them should keep you busy for a while. I'm STILL trying to decide which ones I want!
Post Fiend
Joined: Oct 2005
Posts: 10,626
Likes: 7
From: Plano TX and Brentwood TN
True up until about 500hp. Once your there, your powerband is so far up the rpm range that you might actually have a call to use aftermarket filters as they do flow better when you get up the rpm range. For just stock and even the usual mods(tuner and exhaust) I would stick with the stock one though.
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Posting Guru
Joined: Mar 2006
Posts: 1,798
Likes: 2
From: SoCal, SD CO. East
. I'm adding a ScanGauge II W/XGauge to get more information on fuel consumption, throttle position, and other economy related monitoring. With fuel at $4.30/Gallon (I filled up this morning), I need all the information that I can get to insure optimum performance at all levels.
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Resident smarta$$
Joined: Aug 2006
Posts: 4,929
Likes: 9
From: Oaks,PA
My truck had a K&N on it when I bought it. The filter was white, seemed like it hadn't been oiled in awhile, so I gave it a good soaking. Within 2 weeks it was back to white just about, and there's only one place the oil could've gone
! Needless to say I bought a stocker off Ebay and trashed the K&N.
! Needless to say I bought a stocker off Ebay and trashed the K&N.
More Turbo
Joined: Feb 2007
Posts: 713
Likes: 0
From: KS
i haven't had any problems with my K&N (didn't hang out here when it went on, otherwise i'd have bypassed it), and since i haven't had any problems, nor my dealer with me having it there (even thru a new turbo, likely due to sitting too long w/o being driven). that said, with the info these guys have, i say bypass. keep the stock one.