Cas has 70mm exhaust like the bigger works model and a panel filter inside the stock airbox.
Torque is limited to 400Nm to prevent any damage to the automatic gearbox.
Measured stock 213ps / 300Nm
Stage1+ via the OBD port, 289ps / 400Nm
Mini Cooper S F56 2L 192ps —— > 289ps / 400Nm