I've reached 10+ psi boost stock reading with p3cars gauges
Site below comparing n63 motor (440hp/450lbs-ft) states max boost is 11.6psi
http://www.**************.com/community/threads/engine-shootout-mercedes-m278-w212-e550-versus-bmw-n63-f10-550i.46889/
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2012 550i M Sport Dark Graphite Metallic II Everest Gray Antracite wood 6MT
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