A few months ago BMW rolled out the limited-edition M4 Competition Sport (CS) for the Spanish market, where only 60 units will be made. It appears the German carmaker may have plans to introduce the kitted-up M4 for other markets, according to these spyshots.

However, the test mule seen here appears to differ slightly from the CS in certain areas. While the front spoiler may appear identical, albeit with additional support attachments, the car’s side sills and rear are different from the CS.

On this prototype, the side sills are more pronounced, and the rear features additional diffuser elements. The rear wing is also larger in size here, although it doesn’t look very refined for the final production car.

BMW M4 extreme aero spyshots 20

What appears to be similar to the CS is the lack of the M4 GTS’ grunt, judging by the more reserved-looking hood. Expect a 3.0 litre twin-turbo straight six engine with 450 hp, mated to a seven-speed dual-clutch transmission that sends power to the rear wheels.

We’ll have to wait until BMW provides more information on this mysterious, kitted-up M4. It could be a CS offered for more markets, or something else entirely.

GALLERY: BMW M4 Competition Sport Edition