I would look into the Cobb Tune as well, my son-in-law has one and he swears by it. Its very easy to install and changing maps is a breeze he highly recommends it.

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2012, 650i Coupe, Carbon Black, Black Nappa leather, M Sport , CWP,DAP, IAS, 20" Wheels,
BMWCCA Member since 07/2008