BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Which filter for the N55?? AFE or HP Autowerks?

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      12-17-2010, 10:31 AM   #1
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Which filter for the N55?? AFE or HP Autowerks?

Im looking to purchase a drop in filter for my n55. I saw on HP Atuowerks site that they have the AFE which they say flows 33% more than stock and the HP Autowerks filter which just says is a high performance filter over stock.

Has anyone tested the AFE filter?
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      12-17-2010, 11:03 AM   #2
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The aFe N55 Direct Replacement filter have been an extremely popular choice with my customers. Your correct as the aFe Replacement Air Filter outflows the factory air filter by 33% and is designed to improve both performance and fuel economy. I'll shoot you over a PM with more details. In the meantime, here are a few pictures of this setup for you to check out



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      12-17-2010, 12:06 PM   #3
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I went with the ITG foam filter from HP Autowerks for my N54 and I love it. Their foam filter is basically the same. Extra torque feels good. Wanted to try something different than the regular cotton/guaze.

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