f10 523i under-power

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    Under-power for F10 523i

    Hi everyone here, I'm driving a 523i. Yes, it's by Auto Bavaria, local ride. It's under-power, and I would like to know, may i upgrade the performance? How much it would cost me? ;(
    • ChrisL
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    • f10 523i under-power
    • Replies: 20
    • Forum: 5 Series
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