This Ford Sierra Cosworth was built by Klas Halvarsson to drift. The engine bay no longer holds an inline-four but instead has a turbocharged 2.8 L BMW M50B28 inline-six. It features forged rods, Skogen Racing custom intake, BorgWarner turbocharger, and Ecumaster ECU. At GZ Racing the motor made 616 horsepower and 776 Nm (572 lb-ft) of torque to the wheels on 1.57 bar (22.7 psi) of boost. A manual transmission sends that power to a BMW differential and axles.
Source: K Halvarsson and Skogen Racing FB page