Thread: 3.3RS Dyno Run
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      03-21-2012, 08:23 AM   #6
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Drives: '08 BMW 135i, 08 535Xi
Join Date: Feb 2012
Location: Bethel, CT

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Quote:
Originally Posted by JoeyBananaz18 View Post
Does anyone know why the holes are drilled out from the bumper? is it to save weight?
It's to reduce aerodynamic drag. Air gets trapped within the lip of the rear bumper and the holes provide an exit for the air.

-Josh
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