MaxxECU sent me a link to their torque table TCU flash:
Motorsportprodukter - DCT E9x M3 TCU firmware flash (17.5bar) - MaxxECU
Requires you to send us a M3 E9x TCU for us to flash our custom firmware which increases the clutch pressures from 15.5bar to 17.5bar which therefore increases the transferred torque.
ONLY M3 E9x TCU
1-2 weeks delivery time