Although it was just revealed last week, the facelifted 2021 BMW M5 will soon be joined by an even more powerful and hardcore variant, the M5 CS. As usual, it will slot above the M5 Competition and sport a number of exterior enhancements as well.

According to insider information obtained by BMW Blog, the BMW M5 CS will supposedly debut sometime later this year, though a precise date has yet to be locked down. A good chunk of specific details are also scarce at the moment, but we can confirm the visual changes will include a tweaked front fascia, unique paint options, and wheels. To help reduce weight, BMW will swap in a carbon fiber roof. Aerodynamic drag will be improved thanks to a new carbon fiber rear spoiler. A set of high-performance carbon ceramic brakes with perforated discs will be another option.

Update: Another leak has emerged, showing the engine and interior.

The interior will be even sportier than the M5 Competition's, most likely with even more carbon fiber trim. There'll be plenty of 'M5 CS' badges as well. However, the most significant area of focus is under the hood.

BMW M engineers have figured out how to crank up the 4.4-liter twin-turbo V8's output from the current 600 horsepower and 553 lb-ft of torque to around 650 hp and up to 590 lb-ft of twist. The key to this is an EPS tune and plenty of additional cooling. To compare, the current M5 CS has 617 hp. Enhancing its already hardcore nature, the M5 CS will also boast an improved driving experience made possible with a recalibrated limited-slip differential.

Pricing? Still unconfirmed, but we can make a fairly good guess. The current 2020 M5 Competition starts from about $110,000. Given the numerous improvements, tack on at least another $10k to that amount for 2021.

As usual, production will be limited for all markets though we expect US allocation to be relatively generous.