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      08-04-2012, 07:21 PM   #13
zztwinturbozz
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Drives: 335i xdrive
Join Date: Jun 2012
Location: Denver

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I don't know man do some more searching before you decide. I personally saw way more cars having problems with jb4 than Cobb. I chose Cobb and it was the easiest install you could ever imagine and you can check and clear codes, monitor performance, etc etc all while driving. Highly recommend.