For many years now, German tuner AC Schnitzer has been taking care of concerned customers and their BMWs. Their concerns weren't about lack of power but rather about getting even more power!
Going from the the 70s up to today, all the latest Bimmers underwent the Schnitzer treatment and they proved to be one of the best companies out there for your Bavarian machine.
One of their latest creations is the F21 M135i that, in their version, has 360 HP and 520 Nm (384 lb-ft) of torque. Not only that but all performance-relevant parameters have been tuned and all of this is done using a plug-and-play device that works in parallel with the car's ECU.
The most important part of their product developing though, is testing the new cars both inside cities and on track. To let everyone know just how hard the cars are being tested, AC Schnitzer published a video of such a run, performed on a proper track. Enjoy!
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