A6 / S6 (C5 Platform) Discussion Discussion forum for the C5 Audi A6 and S6 produced from 1998-2004

What purpose is the flap in bottom of air box?

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Old May 10, 2003 | 04:53 PM
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Default What purpose is the flap in bottom of air box?

Bought my '99 A6Q in Nov. Been lurking here and there. Registered this evening!

I opened my filter box while vacumming the pre-filter area. I saw this spring-loaded, foam-lined flap in the bottom. I moved the spring aside to reduce the tension.

I previously had removed the air-intake guide off, to see if performance would change. I think each step has improved it. The sound is more aggressive also.

Should I remove the flap altogether? Will I regret that on rainy days?

I've considered removing the air box itself, and leaving the filter wide open - but on second thought, only for dry cool weather I think.

My first post - eh!
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Old May 10, 2003 | 04:58 PM
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Might regret it, but its to keep water/dirt out.
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Old May 10, 2003 | 06:06 PM
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Default Wow! 2 Canuck posts back to back. Where are you and EgilA64.2s from?.......

I'm from Calgary. No, I don't own an Audi A6. Don't ask- It's a long story.
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Old May 10, 2003 | 06:23 PM
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Stettler, just East of Red Deer, Alberta.
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Old May 10, 2003 | 06:31 PM
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Nice car. Mind if I steal your Canuck flag?.......
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Old May 10, 2003 | 10:11 PM
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Nice Flag.
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Old May 11, 2003 | 09:00 AM
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For mice in cold weather?
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Old May 12, 2003 | 06:27 PM
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Default Re: Wow! 2 Canuck posts back to back. Where are you and EgilA64.2s from?.......

I'm in eastern Ontario - close to Ottawa. The snow belt - quattro country.

I now have a complete set of winter and summer tires. I'm looking for another set of rims - same size 16x7.5 (the "wine-glass" OEM size).

This evening I removed the first screen in the air box, and washed it. I'll leave it off for 24hrs to feel the difference. The inside of my air box is pretty dirty - so I don't think I want to remove that screen permanently.

I got a K&N installed on delivery, and noticed a definite difference from the previous (overnight) test drive. BTW Bought the car from Import Car Center http://www.importcarcentre.com/.

Regards.
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