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Question:

What cold air intake AEM OR K&N?

Which Cold Air Intake would be better for a 2002 BMW 325i 2.5L Which brand makes a better product witch brand is more compatible with BMW Im having trouble deciding between the two.

Answer:

Get a Dinan intake for it, its made in partnership with BMW and doesnt void any warranties. I have an e90 with a Fujita intake and the sound is amazing and upper RPM power is great
I was wondering this myself. I've read on several sites that BMW's OEM intake is already quite good, considering it is factory. Almost everywhere I look says that an intake by itself isn't very cost effective, and you will likely need exhaust and tune before any noticeable gains are achieved. Whichever you decide, you should post a follow-up with how happy you are with it! I'd sure like to know!
I don't think they are worth the extra. I prefer a medium quality knife. The main thing I think is to learn how to keep them sharp. Even a cheap knife properly sharpened will last you decades.

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