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      02-28-2012, 07:09 PM   #6
BiG22DuBz
Private First Class
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Drives: X5M
Join Date: Nov 2011
Location: Sunny SoCal

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U will lose the warranty if you touch the stock cats regardless of catless or aftermarket cat. True power gains come from losing tha cats + TUNE. Plus, u can actually hear the turbos now! Whoooosh
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2014 M5...AMS downpipes, BMS tune, lead foot
2011 X5M....Downpipes, exhaust, dyno tuned
2008 Ducati 848....pearl white, Termignoni exhaust
CLS55 and C6Z06 (previous rides)