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      05-24-2007, 03:02 AM   #3
ksfrogman
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Drives: E90 330i 6MT
Join Date: Nov 2005
Location: Torrance, CA

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Quote:
Originally Posted by Romo View Post
The one on the right is non functional, just for cosmetic reasons. The one on the left is used to suck extra air into the engine. This had to be done because at high RPM there wasn`t enough air pressure available. At 8400RPM the engine needs 400 liter air/minute.
I also asked about the power dome; Yes it is becouse off the airbox acording to BMW people.
Here it is:

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