Coming from a '17 m240i that had sport DP, CAI, and JB4 map 5 so take this however.
I upped from the 225/245 setup to 235/265 setup. Did a 1/8th drag and did it in 7.76 even with the wider tires and tire prep on the track, still spun off the line. Tires were sticking to the track, but when you're putting that much power down, even xDrive doesn't work wonders. Granted, I was on Conti DWS06 19" tires at the time.
What dropped my 0-60 and even my 1/4 mile time on Dragy was going to 18" MPS4S 235/265. Broke into the 11s on the street with dragy just by switching my wheels/tires. I'd start there honestly.