For those that either posses or desire a 5-Series, there are plenty of choices regarding how it’s outfitted. If you desire power, then there is only choice when it comes to engines. And that is the 4.4 liter twin turbo V8 in the BMW 550i xDrive.
And what about those that want even more out of their 5-Series? Well Hartge has something for you. And you might like it.
Coming in the form of an engine kit, it will get your ride up 15%. That amounts to 481hp and 690Nm of torque. The acceleration to 200km/h also shaved down 4 seconds. It is, in one word, a Hartge kit worthy of a BMW 550i xDrive, and the fans out there will welcome it.
I am not sure how popular performance upgrades are with the luxury cars, but the guys from Hartge did a good thing upping the 550i.