Its a 440i... I'm waiting for the 2022 model years for my dream M car.
BMW has developed a new xDrive AWD system for the M8. It gets full torque split between front and rear, and you can decouple the front axle for that RWD fun when you want it.
The plan is to sell the 440i when the 2022 M4's come out that include the new xDrive and a manual transmission 🙂