This example has a Euro-spec 3.8-liter inline-six, a fantastic interior, and it's purple. BMW's M5 is now entering its seventh generation, which means that M5 fans have a choice of many sides to ...

We upgrade our Twilight Purple BMW F90 M5 with Supersprint catless downpipes and a Stage 2 remap! How much power does it gain, and how does it sound? Watch the full transformation and dyno results.