Originally Posted by King

AU555...Leave the damn air intake the way it is! It's not going to make any difference. Obviously the BMW engineers came up with the most efficient design for the vehicle. Chances are you will only make it worse. And most cars with an aftermarket intake have an annoying whistling sound when you accelerate. The biggest difference will only be in your head, like those rice pushers who drive Honda Civics with a big muffler. They think it's faster 'cos it's louder!