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      04-10-2008, 01:26 AM   #6
Evolution Racewerks
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Drives: 20 M340i,15 M4,12 328i,08 135i
Join Date: Feb 2008
Location: Azusa, CA

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Yes, it has a flap. You'll hear it when you start the car up. It makes a audible clunk sound.

Quote:
Originally Posted by gizmo View Post
Yep, like the R32 had. It is a vacuum actuated flap that closes during low rpm driving.

When you perform the golf tee mod, it essentially makes the car slightly louder during the conditions when it would normally be closed and some people say they can feel a slight difference in performance.
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