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      10-09-2017, 10:06 AM   #3
murph914
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Drives: 2014 650i Convertible
Join Date: May 2007
Location: Massachusetts

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There are a lot of aftermarket tunes with a huge range in cost options.

If you want the most hp and the most driveability your best shot is to see a tuner in our area, or even drive to one. Custom mapping a tune to your car and putting the car on a dyno is a proven path for success.

Intake and exhaust look and sound great, but do not add the power they once did. The real power in these engines comes from turning up the boost, but then you have to control the heat. You can always play with swapping out the turbos too.
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