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I just installed a BMC filter on Monday.

Looking at the stock Audi filter next to the BMC it was easy to tell that the BMC is going to let the engine breathe more easily. (I wish I had my camera with me and taken pics to share)

Not sure whether BMC is better or worse than K&N, both companies have a good reputation, though it seems BMC have more motor racing pedigree:

About BMC

About K&N

PS I just looked at BMC's online store (US/Canada) and found that I paid $40 USD less! That's got to be the first time a car part is cheaper in Australia!
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