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Jan 27, 2013 | 09:17 PM

#16

honeydew

Posting Guru

Joined: Mar 2011

Posts: 1,037

Likes: 0

From: Florida

Quote:

Originally Posted by indyF-350psd

this one.....has a dry element and an oiled one......

Riffraff Diesel: AFE Stage 2 Pro Guard 7 Intake

thanks, looks like the ultimate

Jan 27, 2013 | 09:28 PM

#17

izzybird

Laughing Gas

Joined: Feb 2004

Posts: 822

Likes: 9

From: Leander Texas

Quote:

Originally Posted by mechelement

After I installed the 6637, I immediately experienced turbo flutter when pulling grade EMPTY. I used to be able to pull this particular grade with the OEM setup and it didn't flutter. Then the obvious drone at a specific RPM range. My wife was PISSED. LOL. If I can make this go away for $200 and not add an even louder wheel (WW) to the truck, I'm all for it. How does the cost of an AIS filter compare to the cost of a 6637? Is the filter change interval truly 2X the mileage of the 6637?

Be sure what your hearing isn't some turbo surge. If it's light it's hard to hear with the OEM box, but rings pretty clear with an open element.

Jan 27, 2013 | 09:29 PM

#18

Nicmike

Veteran/Sheepdog

Joined: Feb 2012

Posts: 6,047

Likes: 110

From: Western AR

Quote:

Originally Posted by mechelement

The cost works out to even in the end. I am down in dusty Central Texas, and I have put 20k on my AIS filter so far. Not even pulling the filter minder in a little yet. Ford advertised these filters can go 60-75k under moderate conditions. In extreme conditions you should still get 40k out of a filter. Same retailer I referenced before has the best price on replacement filters as well...$57.55, so you should only need to buy one every 3 years or so. Unless you are hot-shotting your truck, of course.