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      07-16-2011, 05:10 AM   #3
Powerslide
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Drives: 2018 F80 ZCP
Join Date: Nov 2007
Location: Chicago Illinois USA

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I could be wrong but I believe the N63 in 550i and S63tu in M5 may not share much more than the engine block and displacement of 4.4l -- interesting question though...
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