[Artemis]

Of course, mostly interested to know whether this test mule features the (since long) rumored 450hp output (S55 engine).

From outside, this seems to be a "regular" M2 Competition featuring several of the M2/M2C M Performance Parts announced last Spring (see here and here).

Black 763M wheels with Michelin Pilot Sport Cup 2 tires (no surprise either).

Several M Performance carbon fiber parts got white camo tape (instead of the usual swirls camo tape): CF splitter (BMW part # 51192449476), CF hood (BMW part # 41612449807) and double-bubble CF roof (BMW part # 41312460277), except for the CF diffusor (BMW part # 51192361666).

Originally Posted by Jason

The biggest indication that this is not just an M2 Competition model fitted with M Performance Parts are its M Carbon Ceramic Brakes, which are not available (either as option nor M Performance Part) on the M2 Competition. Its trunk spoiler is also unique - different than the M Performance version and not yet seen before.

Carbon Ceramic Brakes on an F87 are a novelty. The M2 MotoGP Safety Car (2016) featured prototype CCB's (see here). And the CF trunk spoiler has indeed a different design compared to the M2/M2C M Performance Parts CF trunk lid (BMW part # 41622460277 - see here): M3 CS / M4 CS design (spoiler sitting further away on top of the trunk lid).

Wondering whether, during further progress, BMW M:

• will add the M Performance Parts CF fenders (BMW part # 41352449803 & 41352449804) and the M Performance Exhaust (likely different for EURO-spec because of tight EU emissions regulations);
• will keep the CF trunk spoiler or replace it with a fully integrated one (remember the E46 M3 CSL 'ducktail' trunk lid design, which was made of sheet molding compound);
• will keep the M Performance splitter or replace it with a fully integrated one (but not as big as the M4 GTS splitter), as featured in this render posted in August 2016:

Originally Posted by SCOTT26

An M2 is testing a new aerodynamic aid similar to this.

Also referred to in this 2017 post:

Originally Posted by Artemis

Here's my guess.

It has been confirmed in Summer 2016 that "an M2 model is testing a new aerodynamic aid similar to this".

So, if the M2 CS is supposed to get a bolted-on or integrated 'splitter' (front lip à la BMW GT6 Vision Concept) for aerodynamics and design reasons...

Compare with the M2/M2C M Performance Parts splitter: