Running MCS 1WNR here with the adjuster on the bottom (inverted rear strut) to make adjustments easy, and with Vorshlag camber plates and 600 lb front / 900 lb rear Eibach springs. I can't say enough good things about the 1WNR kit.
Bimmerworld has the following kit available which they have put together due to the demand of a pieced together quality coilover kit for the F8X. Reach out to Phil at Bimmerworld and he will set you up properly.
Street rates on the below link I believe they use 500/800. Not sure what the track performance rates are. I run 600/900.
https://www.bimmerworld.com/Suspensi...-M2-M3-M4.html