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      02-12-2013, 01:08 AM   #18
LAKEOM5
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Drives: 2013 M5 Black Sapphire
Join Date: Apr 2012
Location: Lake Oswego, Oregon

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I pulled my filters and the car feels better. Not really sure about HP gains but it feels stronger. Maybe just placebo, maybe the 15 is real. It seems to breathe easier that's for sure. Sounds better too.
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