All COBB Tuning AccessPORT Flash for N54 335i Discussion Here
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06-13-2013, 12:58 AM
Join Date: May 2010
I have the jb4 g4 and I need to upgrade it to g5 because I'm getting the rb turbos
I understand i need the Cobb ap for the best tuning, so I need uninstall the jb?
I don't understand what is the difference between them?!
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