Ford AIS CFM
Senior User
Joined: Oct 2007
Posts: 115
Likes: 0
From: Foley, MN
I would just do the 6637 mod alot cheaper and flows more! I didnt even check other filter everyone recommended me to do that and i love it! Thanks to everyone again! and im sure others will tell you to do the same
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
I had the AIS with fender sleeve on for 2 years, now I have the 6637 (with Pete's filter sleeve of course). Both yield the same results on a used oil analysis (silicon under 10), like kwik said, I could also pull the AIS filterminder down slightly - both are good filtration systems as well as the AFE, but none can touch the price of the 6637.
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
In this thread LINK Post #14, the AIS is rated at 775 CFM.
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Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
Something ain't right -- the 6637 is supposedly rated at only 425 according to FleetFilter.com. I suspect there is a discrepancy between how the two were measured. The overwhelming empirical data is that the 6637 flows more, so there must be a reason why the two numbers are so drastically different.
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FTE *******
Joined: Jan 2004
Posts: 112
Likes: 0
From: Washington
Flow
We are still offering a discount for FTE members on AIS and all other parts. The discount code is FTE10. I will make sure it is still an active code. For those who don't want to go out and purchase a hole saw for the fender sleeve mod, I am offering that option now.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
That's a cool option for you to include, great idea.....
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Cross-Country
Joined: Feb 2007
Posts: 75
Likes: 2
Your replys have been very informative. I have already read those threads, other threads, and searched and contacted other non-scientific sources.
Then I reckon, according to heresay, it is about 775CFM.
Anyone beg to differ on this #?
Then I reckon, according to heresay, it is about 775CFM.
Anyone beg to differ on this #?
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
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