S55 can be run at higher RPM and delivers maximum HP from 5500 to 7500 RPM while S63tu delivers maximum HP from 5750 to 7000 RPM
Both S55 and S63tu deliver maximum torque from 1500 to 5750 RPM
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Current : 2020 F92 Black Sapphire M8 - ZF8
Gone : 2018 F80 Mineral Gray M3 - 6MT
Gone : 2016 F82 Austin Yellow M4 - 6MT
Gone : 2013 F13 Sakhir Orange M6 -7DCT
Gone: 2013 F13 Alpine White 650i -ZF8
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