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      07-09-2010, 12:47 PM   #17
RyanMv4
First Lieutenant
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Drives: 2106 435xi
Join Date: Jun 2010
Location: PA

iTrader: (2)

Yeah i guess if theres a primary cat on the downpipe the cat delete is the way to go... Im guessing its the 600 cell count because from what I can see they are the exact same size at the two secondary cats on the n54 exhaust systems ...