If you like BMW than you also have to love M Performance parts. M Performance parts are not just carbon fibre bits and pieces, there are also engine upgrade kits that you can install without changing the look of the exterior of your car. Then you can have a 'sleeper.'

If you get the M Performance engine upgrades for the 435i, you can increase the torque to 450 Nm, and the horsepower to 340 HP, and the outside of the car will look exactly like it did when you drove it off the lot.

The M Performance Parts include the front carbon fibre lip, rear CF boot lid spoiler, M Performance wheels and side sills, M Performance stripes, an M Performance steering wheel and a lot of carbon fibre everywhere.

There will also be a limited slip differential offered that will help you get absolutely everything out of the car.

And there is a video too!

So for the M performance parts the way they filmed it I would guess it consist of the Front and side carbon fiber diffuser, M power wheels and rear section exhaust.