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      07-08-2010, 12:15 PM   #3
D.B.S
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Drives: '11 X5 35i / '13 S5
Join Date: Jun 2009
Location: Deployed to Kuwait

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Silly Question, we all know the N54 has a total of 4 cats, how many does the N55 have? I know of 1 after the turbo, but what about 2nd cats?
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BMW X5 35i: Boopie Exhaust & Intercooler, K&N Drop in Filter, JB3 (3+ psi)
2013 Dodge Challenger R/T: CAI, Catch Can, Custom Exhaust, Headers, 87MM Throttle Body, Diablo Custom 93 OCT Tune