The M5 CS debuted last year as “the fastest and most powerful production BMW a car someday, ”and is about to turn out a smaller brother in the form of the M3 CS.

Recently spied on during tests at and around the Nurburgring, the model will essentially be a four-door version M4 CSL.

The similarities cannot be ignored when the spy photographers shot two models parked next to each other. As you can see, each has a revised grille that changes the horizontal bars into a bone-like structure. This is not the only change, as the models have a noticeable front splitter with canadians.

Also read: The BMW M4 CSL features new OLED taillights ahead of its debut on May 20th

Moving on, we can see a carbon fiber roof, aerodynamic mirrors and light wheels wrapped in Michelin Pilot Sport Cup 2. The latter are supported by a high-performance brake system with bronze calipers. Other highlights include a new rear spoiler and a carbon fiber diffuser.

While the rear side windows are camouflaged, M3 CS most likely will not follow in the footsteps of the M4 CSL, excluding the rear seats. However, the company may offer two separate rear seats, both on the M5 CS.

Speaking of the interior, we can see what looks like a carbon fiber front seat with two-tone upholstery. The M3 CS will also feature a curved display with a 12.3-inch digital dashboard and a 14.9-inch infotainment system. Of course, this is not too surprising, as BMW recently announced that it will be a display standard equipment on M3 and M4 this summer.

In terms of performance, we can expect an upgraded 3.0-liter six-cylinder twin-turbo engine that develops about 533 hp. (397 kW / 540 hp). Although this figure should be taken with impatience, it would be a significant improvement over this figure M3 Competition, which boasts 503 hp. (375 kW / 510 hp).

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