The G82-generation BMW M4 is already an exceptionally high-performance sports coupe, boasting capabilities once reserved for exotic supercars with six-figure price tags. With its twin-turbocharged inline-six engine and aggressive handling dynamics, the M4 delivers an experience that blends track-ready power with daily-driving usability. However, for some enthusiasts and tuning specialists, the factory performance simply isn't enough. One of the latest and most extreme interpretations of the M4 comes from Manhart, a renowned German tuner with a reputation for pushing engineering boundaries. Their latest project, dubbed the MH4 900, transforms the already potent M4 into a machine with staggering output and a dramatically enhanced visual presence.
Rather than making minor adjustments or bolt-on upgrades, Manhart has completely overhauled the M4’s powertrain. At the core of this transformation is the BMW S58 engine, which has been modified extensively. Manhart installed two significantly larger turbochargers, a more robust intercooler, forged pistons, stronger connecting rods, and a carbon fiber air intake system. These mechanical upgrades are supported by an expertly recalibrated ECU to ensure the components operate in harmony and to unleash the engine’s full potential.
The results are nothing short of astonishing. The MH4 900 produces a monstrous 922 horsepower and 878 pound-feet of torque—figures that rival those of million-dollar hypercars. For context, this places the Manhart-tuned M4 just shy of the legendary Bugatti Veyron’s 1,001 horsepower. To handle the massive increase in torque and power, the M4’s eight-speed automatic transmission has also been reinforced, ensuring that it can cope with the newfound output.
Although Manhart has not released official performance times for the MH4 900, it is expected to outperform the stock M4’s 0–62 mph time of around 3.2 seconds. With proper traction and launch control, this enhanced version could potentially break into the sub-three-second range, delivering supercar-rivalling acceleration.
To complement the performance upgrades, Manhart equipped the MH4 900 with a stainless steel exhaust system that includes valve control for customizable sound. The exhaust setup also features new downpipes with 200-cell catalytic converters and carbon-coated 110 mm tailpipes. Additional upgrades include H\&R lowering springs for improved handling and a more aggressive stance, as well as bespoke wheels—20 inches up front and 21 inches at the rear—wrapped in ultra-low-profile tires.
The aesthetics have not been neglected either. A more aggressive body kit includes a carbon fiber front splitter, aerodynamic canards, side skirts, a large rear lip spoiler, and a rear diffuser. Inside and under the hood, carbon fiber continues to dominate the design theme, while lightweight carbon bucket seats sourced from the M4 CSL add track-focused functionality.