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I would not have believed it myself unless I saw it!If you have contemplated or have installed the 6637 open air filter on your Ford
Powerstroke diesel (sometimes called the DIY Tymar filter) , you absolutely have to get one of these filter covers. The 6637 is an excellent way to allow a greater volume of air to get to the 7.3 diesel
engine but the advantage is that it does an even better job of filtration than the factory airbox could ever think of. The stories that you have heard about
an under-hood open air filter being bad because it
draws in hot engine compartment air are all untrue. Owners have tested under-hood temperatures in conjunction with air intake temperatures and found that while traveling down
the highway at moderate speeds, there are no more that 5 degrees difference between the factory air box temperatures and the 6637.
I ran a 6637 open air filter for a
couple of years until I found a deal on a FORD AIS. With this cover now available, I'm thinking about putting the 6637 back on.
Now Pete has come up with a way to keep this terrific air filter even cleaner.
Pictured below are two 6637 air filters, one is brand new - the other has 10,000 miles on it
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Can you tell which one is which? I'm going to guess that the one on the right is the new one only because the black plastic is shiny.
Even though I could get 30,000 miles from my 6637 filter, after 10,000 miles without any type of cover, it was starting to show it's age with a collection
of bugs and dirt. I'm telling you, this is the way to go!
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Here is a collection of Pete's customer photos of how he can customize your filter cover just the way you want.
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Back to guzzle's Powerstroke Modification Index
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Click here to visit guzzle's Web Store. An affordable alternative to high priced Ford repair parts. We offer repair o-rings for fuel bowl leaks,
HPOP leaks, oil and fuel rail leaks, seals, repair kits, turbo re-install kits and other parts you can't even get from a Ford dealer.
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