AFE air filters good or bad? - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 09-04-2013, 08:22 AM Thread Starter
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AFE air filters good or bad?

I have been looking for a while and can't seem to get an answer, so my question is does the afe oiled air filter do a better job at filtering than k&n? I had the stage 2 intake on my truck but took it off and did the 6637. I was worried about dusting the turbo. Is the afe better than the 6637 as far as a CAI is concerned?


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post #2 of 14 Old 09-04-2013, 09:24 AM
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I had an AFE system on my truck for about 70,000 miles. Most of those miles was using the standard oiled filter before putting a proguard 7 on. I drive in some dusty conditions and never saw any signs of dust in the system using either filter. I recently put the 6637 filter on because I wanted sense of mind that the filtering was even better.
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post #3 of 14 Old 09-04-2013, 11:04 AM
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I currently have an AFE II Pro Dry S with a pre-filter.

So far so good!

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post #4 of 14 Old 09-04-2013, 11:14 AM
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I dont think their has ever been a test to see if the AFE unit filters better than the K&N unit so pretty much everything anyone is going to say is just personal opinion... My personal opinion is that the AFE is better.... If it were me i would go with the Pro Dry S
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post #5 of 14 Old 09-04-2013, 11:21 AM Thread Starter
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How long have you had it on the truck? I liked the afe before but I was concerned about to much getting past the filter. Do the dry filters do a better job than the oiled ones?


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post #6 of 14 Old 09-05-2013, 12:59 AM
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I have an AFE stage 2 intake oiled filter and it works just fine. Pulled the filer off before a road trip a few weeks ago to brush off some dust & debris from the outside and you can eat off of the inside. A K&N filter of similar design will work just as well - it is the drop in filter for the stock housing that has fitment issues. Even the best system will do damage if it is not installed properly. There is nothing guaranteed fail-safe against ****pit failure on an install
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post #7 of 14 Old 09-05-2013, 01:43 AM
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Quote:
Originally Posted by Raul@Stealth Automotive View Post
I dont think their has ever been a test to see if the AFE unit filters better than the K&N unit so pretty much everything anyone is going to say is just personal opinion... My personal opinion is that the AFE is better.... If it were me i would go with the Pro Dry S
there has absolutely been testing done between AFE and K&N (and S&B and the popular large paper filters)

AFE is the best high flow/performance filter out there. the 7 layer is the best filtering giving up a little flow to the 5 layer.

The paper filters filter best giving up some flow obviously.

I wouldn't let a K&N anywhere near one of my trucks. Personally I wouldn't let an S&B anywhere near one of my trucks
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post #8 of 14 Old 09-05-2013, 07:19 AM
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My silicon reports have been the lowest with the Ford AIS, between the AFE and the K&N the AFE results were much lower. I see numbers below 5 with the Ford AIS intake, the AFE were always under 7, besides one number 8 that I received one time after many miles off road. The K&N had numbers above 12 and was removed really quick. I hope this helps someone.

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post #9 of 14 Old 09-05-2013, 07:23 AM Thread Starter
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I like the afe setup but was concerned about the filter not being as good as it should, that's why I went to the 6637. I am now thinking of going back to the afe setup and using the pro dry s. Any thoughts?


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post #10 of 14 Old 09-06-2013, 04:25 AM
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The best filters are either the Big Donaldson used in the Tymar intake or in the Ford AIS..only filter kits we will sell.
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