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3.8-3.9 is normal for the M5.
Official is 4.2 - Official HP 560
BMW #'s are underrated.
I have gotten 3.9 in my M5 without trying. Used P3 Gauge to count.
Carnegie center.. lol - Princeton's business track.
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2013 BMW INDIVIDUAL ///M5 {Frozen Black/Amaro Brown/Amaro Brown Alcantara/White Contrast Stitching/Piano Black Trim}
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