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K&N air filter for 2004 B6 S4

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Old 04-02-2008, 02:23 PM
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Default K&N air filter for 2004 B6 S4

All,

I am a regular viewer and not often poster and I could use everyone's infinite wisdom. I have an '04 B6 S4 and was wanting to get a K&N air filter for it. On K&N's website, it says that they don't make one for an '04, but they do for '05 and onwards. I even wrote to them and they said that they "don't offer a product for my car". Is the airbox different for '04 compared to later years? I have seen plenty of '04s on here with them, how did you guys do them? I apologize if this is a repeat question. Thanks for any help you can ofer. -Brit78
Old 04-02-2008, 05:23 PM
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save your money - no improvement over stock
Old 04-02-2008, 05:29 PM
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Default Re: save your money - no improvement over stock

Ok great, thanks for the tip. Any easy stock replacement suggestions that work ok?
Old 04-02-2008, 05:44 PM
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Default I'm no expert - some say K&N in stock box is better

others have dyno'd and seen no difference. Check the tech pages or search "K&N" for info
Old 04-02-2008, 05:47 PM
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Default Re: I'm no expert - some say K&N in stock box is better

So I guess that's the same one for the '05? Must be the same airbox in an '04 as an '05 right?
Old 04-02-2008, 07:44 PM
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Default Yes K&N does not advertise an 04 product but 05 is same airbox.

I got one, plan to put it in over weekend. will post my thoughts.
Old 04-02-2008, 09:00 PM
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Default K&N in stock airbox is better to save money down the line...and supposedly a little throatier

without losing the cold air intake of the stock system. If I were to go back to aug 26 2003...that's teh route I would have gone (albeit, the K&N drop in replacement wasn't around until 2005 iirc)
Old 04-03-2008, 04:45 AM
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Default Re: Yes K&N does not advertise an 04 product but 05 is same airbox.

Please let us know how it goes. And thanks for the info.
Old 04-03-2008, 04:46 AM
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skip...can't better the oe setup.
Old 04-03-2008, 08:00 AM
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bpp, he's talking about the filter, not the intake.


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