here's my first attempt at a replica. I still have a lot of things to learn but i love the new BMW M4 so much that i had to give it a try. And if you use your imagination a little bit, it actually looks similar:
I've only done the front because the tail lights are much too detailed and complicated, for me at least. But i'm satisfied with the looks of the front, knowing there's still room for improvement. I like how the angel eyes turned out though
EDIT: I see someone tried to make the M4 before me, and he chose to use one specific set of headlights that the game already provided. Me on the other hand, i tried to put some basic shapes together to resemble the M4's headlights as much as i can, but that makes it look a bit cheap and unrefined. Sorry for that.
2nd EDIT: actually, when zoomed out a little bit, i think it looks closer to the original. Also, i had a go at the engine, and i make 9hp more but 53Nm less. However keep in mind that the BMW's real engine is a twin-turbocharged I6, something that's not yet in the game so i use a single turbocharged I6.