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  #1  
Old 03-27-2008, 04:17 PM
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Is there a K&N filter for the E70 X5 4.8?

I've always had K&N air filters on my Porsches.

Is there a K&N filter for the 2007 X5 4.8?
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  #2  
Old 03-27-2008, 04:38 PM
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I'm sure they will make one, though it is utterly useless and provides nearly no gain in either MPG or HP
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Old 03-27-2008, 04:39 PM
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Why would one want one?
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Old 03-27-2008, 07:45 PM
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They let too much dirt in and can take out your mass air flow sensor. I would just stick with the factory filter.

Craig
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Old 03-28-2008, 10:06 AM
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Yes, a K&N doesn't improve performance, costs more, takes more maintenance, doesn't filter the air as well, and can mess-up the MAF with oil residue.

Very few stock engines Today are limited by air intake resrictions due to the air filter. As a result, a lower-restriction filter will do nothing unless you also open up the exhaust with a less restrictive exhaust system.
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Old 03-28-2008, 04:59 PM
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I'd have to agree with everyone here. There are just too many problems that can arise with the K&N to offset the benefits of a few hp.

I'm keeping it stock. At least until any mods prove to provide substatial power to the 4.8.
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