From the various dyno charts I've seen, the S58 is much stronger than the S55 on the top end, which IMO better fits the character of an ///M car.
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Porsche 911 turbo 2021 992 GT Silver
Previous cars: M4cs 2019 F82 Limerock Grey / M4 2015 F82 Silverstone / M3 2008 E92 Silverstone / M3 2002 E46 Carbon Black
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