Full M3 swap apparently. Gorgeous.
https://www.carscoops.com/2018/06/bmw-wont-make-f81-m3-touring-guy-built-one/
(IG link below - it loads fine on phone but may have to refresh desktop to see)
https://www.instagram.com/p/BsT0uwKHO6c/?utm_source=ig_share_sheet&igshid=o8cvb1tylezr
https://www.carscoops.com/2018/06/bmw-wont-make-f81-m3-touring-guy-built-one/
We figure the*340i xDrive*would be a good starting point. After all, it can be had in RWD or AWD, and has a punchy engine. But surprisingly, the car shared here appears to have started life with a*diesel engine*under the hood. That’s before the owner swapped the original unit for an S55 unit, which initially made 450PS (444hp / 331kW) and 550Nm (406lb-ft) of torque.
(IG link below - it loads fine on phone but may have to refresh desktop to see)
https://www.instagram.com/p/BsT0uwKHO6c/?utm_source=ig_share_sheet&igshid=o8cvb1tylezr