[Video] Ride the 621HP BMW Z4 Manhart 5.8 V10

Manhart Racing decided to put an S85 engine on a Z4 just to see how it would turn out. They also modified the V10 to make more power, to push it even higher than the 500 hp. To achieve this, the engine was bored and stroked to 5.8-liters and, due to some more tinkering with the intake, exhaust, camshafts and other tricks, they managed to get the power output of this enlarged version of the S85 to 621 HP. They had to modify a few other things to make sure it works fine like the gearbox and brakes. This is probably the most hardcore Z4 ever made and, as you can see, it goes really fast with a soundtrack worthy of the best F1 tracks in the world. And that manual gearbox is something to die for. Enjoy!