BRABUS PowerXtra B40S-800: Unleashing Supercar Performance in the 2025 Mercedes G63 AMG W465

The Mercedes-AMG G63 has long been celebrated as the ultimate luxury SUV, combining off-road heritage with modern-day supercar levels of performance. Yet for those who demand more than even Affalterbach can deliver, BRABUS continues to push the limits of engineering with the PowerXtra B40S-800 performance kit, now available for the 2025-on Mercedes G63 AMG (W465).

Engineering at Its Core

The heart of the B40S-800 package lies in a pair of BRABUS special turbochargers. Equipped with larger Ø 52 mm compressor units and reinforced axial bearings, these turbochargers are engineered to handle extreme loads while delivering consistent, reliable boost pressure. The result is smoother power delivery across the rev range and explosive acceleration when you demand it most.

A dedicated BRABUS PowerXtra control module works in tandem with the factory ECU to seamlessly optimize fueling, ignition timing, and boost management. The integration is fully plug-and-play, meaning no permanent modifications are required—just precision German engineering designed to elevate your G-Wagon’s performance to an entirely new level.

Performance That Redefines Expectations

With the B40S-800 upgrade, the 4.0-liter twin-turbo V8 leaps from 585 hp (430 kW) to a staggering 800 hp (588 kW). Torque climbs from 850 Nm to a brutal 1,000 Nm, giving the G63 effortless thrust at any speed.

The numbers speak for themselves:

• 0–100 km/h drops from 4.5 seconds (stock) to just 4.1 seconds, a remarkable feat for a full-size luxury SUV weighing over 2.5 tonnes.
• Top speed increases from the factory-limited 137 mph to 149 mph with BRABUS tuning, placing the G63 firmly in the league of high-performance supercars.

This transformation isn’t just about raw numbers—it’s about turning every drive into an event. The added torque makes highway passing instantaneous, while the acceleration surge rivals that of exotic sports cars.

Everyday Usability Meets Motorsport DNA

Despite its massive performance gains, the B40S-800 kit has been engineered with reliability and everyday usability in mind. The plug-and-play installation allows the upgrade to integrate cleanly with the stock drivetrain and electronics. BRABUS ensures that the system is not only powerful but also compliant with the G-Wagon’s luxury ethos—smooth when cruising, yet ferocious when unleashed.

Why Choose BRABUS?

For decades, BRABUS has been synonymous with taking Mercedes-AMG vehicles beyond their limits, combining uncompromising performance with meticulous attention to detail. The PowerXtra B40S-800 is no exception: a performance kit born from motorsport-grade engineering but designed for discerning owners who want their G-Wagon to stand apart from the rest.

The Ultimate G63 AMG Experience

With the BRABUS PowerXtra B40S-800, the 2025 Mercedes G63 AMG W465 becomes more than an SUV—it becomes a supercar in disguise, wrapped in the unmistakable silhouette of the G-Wagon. Whether carving through city streets or commanding the open highway, this upgrade ensures that your G63 delivers power, presence, and prestige like nothing else on the road.