G-POWER’s 650 HP BMW M4: Street-Legal Beast Unleashed
G-POWER, a name synonymous with high-performance BMW tuning for over 40 years, has taken the BMW G82 M4 to unprecedented levels with their latest creation – the G4M Bi-TURBO. Known for delivering both visual and technical upgrades, G-POWER’s enhancements transform this sports coupe into a true powerhouse while maintaining full street-legal status under German regulations.


ArrayThe G4M Bi-TURBO is as visually striking as it is powerful. Key exterior highlights include the GP-Venturi RR carbon hood, which not only looks stunning with its clear-coated finish but also features G-POWER’s Dynamic Venting technology for improved engine ventilation. This hood has undergone extensive testing to meet Euro NCAP pedestrian protection standards, ensuring it remains street-legal.
Complementing the hood are GP-SHURIKEN carbon fiber front corner attachments and G-POWER’s signature bright orange bodywork accents. The combination perfectly matches BMW’s factory-fitted M Performance carbon fiber components for an aggressive, cohesive appearance.

Performance: Power Beyond Limits
From the factory, the BMW G82 M4 delivers up to 530 hp, excluding the CSL and CS special editions. However, G-POWER has unlocked new heights for the 3.0-liter S58 twin-turbo inline-six engine. With their GP-650 performance software, ECU unlock, and GP-DEEPTONE rear muffler, the G4M Bi-TURBO now churns out a staggering 650 hp and 780 Nm of torque. The addition of a sport downpipe with 200-cell catalytic converters improves exhaust gas temperature, reduces back pressure, and enhances both the turbo’s sound and responsiveness. Notably, these upgrades come with ECE approval, ensuring no formal registration hassles.