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      05-18-2012, 01:26 AM   #27
Singletrack
4th down; 4th quarter? Renegade.
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Drives: 09 SSII E92 M3; 12 AW X5d
Join Date: Aug 2008
Location: Pittsburgh, PA

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What exactly do you hope to figure out? Trust me, the akrapovic unit is likely the best. They are beyond exhaust super geeks. Most xpipes are pretty damn close in terms of performance. There is not really any great discovery to be made here.