MANHART's MHX5 800 Tune Gives BMW's X5 M Competition a Whopping 823 HP

There's no slowing down MANHART as the German automotive customizer continues to deliver incredibly powerful tunes to already impressive cars, and the latest in its line-up is the MANHART MHX5 800 -- simply put, an 823 HP take on the BMW X5 M Competition.In standard form, the X5 M Competition produces 616 HP and 553 lb-ft of torque from its 4.4-liter twin-turbocharged V8. However, MANHART thought this wasn't enough, so it's added a new turbo kit, an intercooler, and its own MHtronik unit and ECU...