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Old 08-15-2012, 07:00 PM   #1
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K&N filter

The previous owner had this installed, I've read a lot of stuff about this but I still want your guys opinion! Should I keep it on or should I take it out?

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Old 08-15-2012, 07:12 PM   #2
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If its just a drop in filter trash it. If its a Cai still trash it.

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Old 08-15-2012, 07:13 PM   #3
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If you are not frequently driving off road in very dusty conditions, it's fine.
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Old 08-15-2012, 07:49 PM   #4
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Well I live in Arizona so its pretty much desert over here
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Old 08-15-2012, 10:40 PM   #5
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Get rid of it anyways. If you want an intake get the spectre cowl intake.
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Old 08-16-2012, 05:13 AM   #6
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Get rid of it anyways. If you want an intake get the spectre cowl intake.
I know about the spectre but who says that filter is any better than a K&N?
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Old 08-16-2012, 05:20 PM   #7
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Take a look down the throttle body and post a picture. I'm curious what it looks like running a K&N in the desert. Good luck.
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Old 08-16-2012, 05:27 PM   #8
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Get rid of the K&N, it is well known to be a bad choice as an air filter filter when you have to drive in dusty conditions like anywhere near or in deserts. Swap it for an AC-Delco, Purolator, Wix, or Fram air filter.
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Old 08-16-2012, 06:28 PM   #9
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Quote:
Originally Posted by Neil F.

I know about the spectre but who says that filter is any better than a K&N?
The proven tests do.
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Old 08-16-2012, 06:44 PM   #10
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Show me a test of K&N vs Spectre
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Old 08-16-2012, 07:10 PM   #11
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Quote:
Originally Posted by coolbreeze
Take a look down the throttle body and post a picture. I'm curious what it looks like running a K&N in the desert. Good luck.
Im pretty new to this stuff, what's and where's the throttle body?
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Old 08-16-2012, 07:16 PM   #12
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The air goes in through the filter, through the intake tube, and into the throttle body that is bolted onto the engine. The TB contains the big butterfly air valve that opens when you push the accelerator...like a carburetor, but it handles no fuel in the fuel injection age like the carb did. If it has visible dust/dirt in it or the intake air tube between the TB and the filter, the filter is not probably very good.
I'd get rid of the K&N, myself. I like their oil filters though.
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Old 08-16-2012, 07:53 PM   #13
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Jerry, can you post this guy the link of the filter test please? Thanks.
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Old 08-16-2012, 08:47 PM   #14
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I know about the "filter test" but I specifically said "K&N vs Spectre". That test does not have a Spectre filter in it. You said get rid of the K&N and get a spectre. Yes the spectre kit provides true outside air and is a bit higher up to avoid water intrusion but is the spectre any better at filtering out dust than a K&N? I'd trust K&N that has been around for longer time and used buy a lot more people vs. a smaller and newer company.

I have had a K&N in my on-road vehicle for 23 years (260k mi) and my SUV for 12 (170k mi). There is also a drop in in the Jeep from the previous owner (5 years and 80k with me and unknown with the PO). I'm not worried about using one.
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Old 08-16-2012, 08:51 PM   #15
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And im pretty sure the spectre filter is the same type as k&n. I have k&n in my jeep. But its not very dusty where I live.
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Old 08-16-2012, 10:01 PM   #16
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K&N FIPK II w/AEM modification

AEM Synthetic filter for Ram 1500


Fits the K&N FIPK II intake perfectly!
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4" 33" to 35"
https://scontent-b-sjc.xx.fbcdn.net/hphotos-xpf1/t1.0-9/1517457_10203416408666416_5192773015714389607_n.jp  g
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Old 08-16-2012, 10:05 PM   #17
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Take a look down the throttle body and post a picture
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Old 08-16-2012, 10:20 PM   #18
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Quote:
Originally Posted by ElsalGaston View Post
Take a look down the throttle body and post a picture
Full inspection turned up nothing.

I swapped the K&N Filter for the AEM filter because on my Ford Ranger, I had issues with the filter oil damaging the Mass Air Flow sensors on a regular basis. I ran my K&N Filter for about 1 year until I heard about the AEM swap. I have been happy ever since.
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4" 33" to 35"
https://scontent-b-sjc.xx.fbcdn.net/hphotos-xpf1/t1.0-9/1517457_10203416408666416_5192773015714389607_n.jp  g
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Old 08-16-2012, 10:44 PM   #19
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I was always an advocate for K&N filters and honestly I would still run one if it was in the city with no dusty driving. They filter very poorly and my oil report along with all the dust and dirt inside the intake tube show that they don't filter well. A paper filter may not flow as well as a K&N, but the air the engine sucks in is a lot cleaner. I will not run one on a vehicle that is in dusty conditions. I wish I would have taken a picture of the dust in the tube when I replaced it, but I did not.
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Old 08-16-2012, 10:58 PM   #20
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The spectre has a prefilter. That's all their is to it. I would put a pre filter in any intake other than OEM.
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Old 08-16-2012, 11:05 PM   #21
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This is great! Thanks for the replies guys, and since im in desert.. Looks like I'll be taking out my K&N soon!
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Old 08-17-2012, 06:30 PM   #22
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There is usually only a small fraction of air pressure drop across the actual (clean) filter element anyway. I don't see any point to not using the best OEM type air filter, dirt catching efficiency wise, that you can find. In my opinion, the AFE ProDry S is a pretty good air filter if you really want a washable unit.
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Old 08-19-2012, 10:33 PM   #23
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Hmm okay, I'll look into it!
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Old 10-01-2012, 10:23 PM   #24
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Quote:
Originally Posted by TheDesertOutlaw View Post
K&N FIPK II w/AEM modification

AEM Synthetic filter for Ram 1500
Hey I have a jeep where the PO had a fipk ii installed, now I want to do the AEM mod, can you link me to the correct AEM filter?
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Old 10-01-2012, 10:25 PM   #25
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Quote:
Originally Posted by b0b

Hey I have a jeep where the PO had a fipk ii installed, now I want to do the AEM mod, can you link me to the correct AEM filter?
Do you mean AEM or OEM...
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Old 10-02-2012, 05:40 AM   #26
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Do you mean AEM or OEM...

AEM Synthetic filter for Ram 1500
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Old 10-02-2012, 09:13 AM   #27
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Quote:
Originally Posted by doclouie View Post
A paper filter may not flow as well as a K&N...
That a K&N can flow more air is only relevant in vehicles with restrictive air intake systems. And there are vehicles whose performance can benefit from a K&N because their air intake system is indeed restrictive. The Wrangler TJ is just not one of them.

The Wrangler TJ's OE air intake was purposely designed by engineering to be completely non-restrictive. In the TJ's case, the size of paper element air filter used in its filter box has so much surface area that it doesn't restrict air flow in the least... it can easily flow more air than the engine can ask for at wide open throttle and at redline engine rpms. So replacing the OE style filter with a K&N in a Wrangler TJ will do nothing for performance. What will the K&N do? Let more dust and dirt in.
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Old 10-02-2012, 09:19 AM   #28
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So replacing the OE style filter with a K&N in a Wrangler TJ will do nothing for performance. What will the K&N do? Let more dust and dirt in.
yep, but I don't feel so mechanically inclined, nor do I have the OE air setup, to take the K&N out that the PO installed, so I was thinking that AEM filter mod was an easy fix to the K&N issues.
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Old 10-02-2012, 09:25 AM   #29
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At the very least, head over to your local 4x4 shop and buy a prefilter to fit over the top of the K&N to help reduce how much dust and fine dirt it passes.

When I used to run a K&N, it didn't take me long to discover how much dirt it was letting past so I ended up installing two prefilters over it. I soon discovered the first prefilter, an Undewears, wasn't quite enough because its fit was imprecise enough that it was letting dirt in around it. The second filter I added was an oiled foam Unifilter as shown below... its primary purpose was simply to hold the Underwears filter tighter to the K&N.

Both prefilters are pulled back in the below pic to show them.
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Old 10-02-2012, 09:48 AM   #30
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Can you buy those online, or any stores in the Chicago area you know of? thanks for your help

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