Maximum power from the 2.5-litre turbo unit has been increased to 395 bhp (295 kW / 400 PS) while torque goes up to 540Nm (398 lb-ft). Its 0 - 62mph time is now 3.7 seconds and top speed is a limited 250km/h (155mph).
Only 75 units of the Cosworth Impreza STi CS400 are being manufactured exclusively for the UK market. Pricing starts at £49,995 (US$71,700/