AIS vs 6637
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Postmaster
Joined: Jun 2007
Posts: 2,621
Likes: 1
From: Sweetwater Texas
AIS vs 6637
I'm about to swap out my filter assembly and/or intake and was wondering on how the 6637 holds up to the AIS. I know the AIS is more expensive, but any other pros/cons??
Thanks
Thanks
Postmaster
Joined: Jan 2009
Posts: 2,667
Likes: 1
From: Glen Rose,Texas
There may be some benefits one over the other but either one is a great addition to getting cleaner air in the turbo.Myself,I like the 6637.Why?I like the whistle of the turbo.
BTW...Thanks for your service!
BTW...Thanks for your service!
Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
Is the AIS a FORD part? and is it still available? I know the filters for it are EXPENSIVE!!
BTW did you all see my post about the FRAM TOUGHGUARD Air filters?
The stock Late '99-'03 7.3 takes the TGA9400 unit.....I've had good luck with these type of drop ins...
BTW did you all see my post about the FRAM TOUGHGUARD Air filters?
The stock Late '99-'03 7.3 takes the TGA9400 unit.....I've had good luck with these type of drop ins...
Cargo Master
Joined: Feb 2010
Posts: 2,298
Likes: 94
From: Delta, CO
The filters might be a little pricey but they last a good while
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
AIS is premium filtration, much more costly, and significantly quieter.
6637 is really really good filtration, very economical, and allows much more turbo noise to be heard.
Both have higher air flow ratings in comparision to stock.
6637 is really really good filtration, very economical, and allows much more turbo noise to be heard.
Both have higher air flow ratings in comparision to stock.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
I went from AIS to 6637 and then back to AIS. 6637 drone was just too noisy.
My 38R whistles too loud with either.
Sounds like a friggin' siren.
My 38R whistles too loud with either.
Sounds like a friggin' siren.
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Postmaster
Joined: Jun 2007
Posts: 2,621
Likes: 1
From: Sweetwater Texas
I'm just not a fan of the box design at all, mine is starting to warp and my turbo is starting to show signs of dusting. I've hit big mud holes and found traces of moisture inside of my intake post filter, and I'm running a TG filter.
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Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
They both have shown excellent results on used oil analysis reports with under 10 ppm silicon. But if you are throwin water n mud and found traces of water post filter then you might be better off with the AIS or the 6637 synthetic filter media (not the paper media) with one of these covers.
Here is the link:
Welcome to Pete's 6637 Intake Cover Web Page
More Turbo
Joined: Jan 2005
Posts: 574
Likes: 39
From: Carthage, Mo
Ran a 6637 for awhile & bought the AIS. Loud vacuum cleaner sound under the hood was an issue for me while towing long distances on the highway. Either one is great, I just prefer the OEM look.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Doing this from my phone so I can't see the sigs. Just wanted to add that cab noise also depends alot on the year of your truck since the later models seem to have better insulation. My 2000 Ex has more cab noise than my 2003.
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