I think the BMW M4 is already a very good car from the factory, especially with the Competition Package. My whole goal for the car is to tastefully modify it, while keeping it as stock as possible, I wanted to add a few mods to make it mine and distinguish it from other M4's.
I added the BMW M Performance side blades and Lightweight front lip. It goes well with the M Performance carbon fiber rear spoiler and mirror caps that's already on the car.
Now the question is should I call it day here or add the M Performance rear diffuser? Hmmm...