by the way, if you cant find a reputable tune where you are located im sure that veizu has a dealer out there. They are one of the larrgest tuners out there. i have it on my car and i imagine that it is similar to the AA (tune Maybe not as good? i have no idea im the first American z4 to have it). the tune makes a very noticable difference with the mid range very similar to the AA dyno charts. everything said above is right though, and i would strongly recomend giving the Aero bumper a look over the M bumper
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