Oh, look. There’s another German aftermarket company that has prepared a program for the BMW 4 Series. At this rate, we’re probably going to see enough aftermarket programs to fill up an entire catalog. Not that it’s a problem, given the 4 Series is nothing short of awesome. This is exactly why so many tuning firms are jumping all over it. And now we have the German aftermarket company Best-Tuning, which is known for its works on Bavaria’s finest.