Manhart has turned the BMW M4 CSL into the outrageous MH4 900, boosting its twin-turbo inline-six to 909 hp and 1,190 Nm of torque—more power than a McLaren P1. With upgraded turbos, forged internals, and an aggressive carbon-fiber body kit, this limited-build monster takes BMW performance to another level. Is 909 hp too much for a road-going M4?



