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      09-29-2008, 02:15 AM   #16
HP Autosport
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Originally Posted by ACZakka325i View Post
Whoa whoa whoa, you can tell the difference by just changing the type of filter?

Does this provide documented increases in air flow? I'd consider buying it just for the sound.
There is probably a few ponies there, but not enough for the butt dyno to feel.

The sound is just an added benefit!
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