@rpmtuningofficial: 2022 BMW M5 CS (F90) - S63B44B - RPM Stage 1 Spec: • 4.4L S63 twin-turbo V8 • Hot-vee layout, twin-scroll turbos • M xDrive all-wheel drive Mods: • ECU Permanent Unlock • RPM Custom Stage 1 • @xhpflashtool Stage 3 Gearbox Tune Stock BMW Claim: 🔹 635hp - 750Nm RPM Custom Stage 1: 🔹 760hp - 1000Nm Gains: 📈 +125hp 📈 +250Nm The M5 CS is the rarest and most focused F90 BMW built. Lighter, stiffer, and the most powerful S63 ever fitted to an M5. Not a car you see often. Even so, the factory still leaves room. After a permanent ECU unlock and a custom Stage 1 calibration, this car makes 760hp and 1000Nm. The XHP Stage 3 gearbox tune goes in alongside it. At 1000Nm the transmission has to hold what the engine is making, otherwise the torque limiters simply give it back. Engine and gearbox tuned together, as they should be. 🏁

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Monday 31 August 2026 09:36:47 GMT