555hp is too conservative for this M5.. This is BMW. It will have to possess more horsepower than the current "King of the Ring" Caddy CTS-V & out perform it.. 600hp!
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2007 335 coupe Alpine white, steptronic, sportpack, etc. (gone)
2006 X3 3.0 steptronic Titanium Silver, 2009 E92 335xdrive, next.... Caddy CTS_V! 13 Lincoln MKZ? hmmm.
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