Early 99 diy intake - Ford Powerstroke Diesel Forum
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Old 12-17-2013, 06:04 PM
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Early 99 diy intake

I just ordered my 6637 air filter, what else do i need to install it to my truck? Just a 4.5 inch hose clamp and a 45* 4 inch bend?
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Old 02-04-2014, 01:32 PM

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That should cover it. A pre filter cover to the 6637 is a nice addition. Helps extend the life of the filter and they look nice.
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Old 02-04-2014, 09:53 PM
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yep, ladies nylons work as great pre-filters, use these in the sand

although you might need some biggggg nylons for the filter haha
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Old 02-14-2014, 02:38 AM
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I have gotten by with using straight 4" pipe (not the 45) on my E99. However, flipping the intake tube from the filter to CCV fitting end-for-end and rotating for best fit is needed, and the filter ends up on an angle, not square to fender and battery. Which actuly allows less blockage of the filter and better air flow because its not tight against the battery.

Edit: 4" pipe needs to be about 6-7" long.

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Last edited by dieselcrawler; 02-15-2014 at 02:57 PM.
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