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Old 02-18-2008
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Motorcraft air filters?

I went to Murray's a local Auto Part store and they didnt have air filters in stock, in they're system, or in they're hard book for a 4.0 liter. Do I have to buy Fram? Has anyone else had problems locating Motorcraft air filters for the 4.0?
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Old 02-18-2008
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Might almost be easier to jsut order one online...

Not sure what your funds allow.. but most of teh comunity here specializes in ordering up K&N, whetehr its a drop in or cold air.. the drop in is usually washable, and allows an awful lto mroe air through, along with much better air filtration.
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Old 02-18-2008
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The only downside to a K&N is the oil. It kills your MAF. So plan on cleaning that as well.

As for an air filter, all the big companies make one.
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Old 02-18-2008
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I prefer the amsoil filter myself, but I have had good luck with K&N also...
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Old 02-18-2008
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The Motorcraft air filter is stupidly over-priced, and is most likely a Purolater. I've always used Wix.
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Old 02-18-2008
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Just want to make a clearification. A K&N does NOT filter better. It allows for a higher flow rate at a given Delta P. (pressure change accross the filter)
That reduction in restriction allows for more air flow.. and therefor more TQ *potential*.

Now.. I've personally rebuilt engines that have used K&N filters. And while I do see traces of debris in the intake manifold. I've yet to see valve seat, valve guide, or cylinder ring/wall wear because of the increased debris.

My solution is to run a conical K&N w/a outerwears pre-filter. You get the best of both worlds that way.

Rich
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