This 540i M Sport focuses on refining the classics: Condor engine mounts and subframe bushings tighten drivetrain motion and reduce unwanted movement, while IE camber plates let you dial suspension for better grip. The UUC short shifter and knob make shifts noticeably crisper, and Einhorn’s e-brake handle plus a tasteful roundel add refined cockpit details. The result is a GT that feels modernized without losing its comfortable, heavyweight character — more precise, more engaging, and still composed on long drives.