Thread: stage 1 bmw installed, impressions
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      05-20-2017, 09:28 AM   #12
ARC550
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Drives: M3, X5, 720s, X5, 750xi
Join Date: Nov 2013
Location: New York

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It's roughly 50whp and 60/70wtrq gain ove stock on Dyno.
I know Because I tested on my M5 and M6
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