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      07-28-2011, 12:24 AM   #3
clarence
Lieutenant Colonel
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Drives: F30 328i M-Sport
Join Date: Mar 2006
Location: Hong Kong

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If u have hot climate version then both grills will be open as additional cooling is required (extra radiator & oil cooler). For normal version at least 1 grill should be open for 535/550 (oil cooler only).
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