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m3 software

  1. Do I Need Software??

    General E46 Forum
    Hi everyone, I recently purchased SS headers, SS cats, SS x-pipe, AP exhaust and a K&N intake for my 2003 M3 Coupe, is there a specific software/chip that would be ideal for my upgrades as I could only find certain chips for certain up grades (ie. intake no cats/euro headers, no cats) but not...
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