4.4T RSS

BMW M5 G90 — The New Era of M PowerThe all-new BMW M5 G90 represents the most radical departure in M5 history. For the first time, BMW's flagship performance sedan pairs a twin-turbocharged V8 with an electric motor, creating a plug-in hybrid powertrain that produces a combined 727 HP and 738 lb-ft of torque. The G90 M5 sprints from 0-100 km/h in 3.4 seconds, weighs over 2,400 kg, and sends power through an 8-speed automatic to all four wheels via xDrive.The engine at the heart of this system is the S68 — BMW's latest twin-turbo 4.4-litre V8, replacing the legendary...

BMW S63 4.4T V8 Engine Guide — M5 F90, X5M, X6M The BMW S63 is the twin-turbocharged V8 that has powered BMW's most powerful production cars for over a decade. In its latest and most potent form — the S63B44T4 — it sits in the M5 F90, X5 M Competition, and X6 M Competition, producing up to 617 HP from the factory. This guide covers the S63's distinctive hot-vee architecture, stock output, every tuning stage from a simple ECU flash to 900+ HP builds, known weak points across S63 generations, and the supporting modifications you need at each power level....