The exterior was refinished in black, the interior was reupholstered in red leather, and the drivetrain was overhauled with the installation of a 1,720cc Type 616/7 Super 90 flat-four, a Type 741 four-speed manual transaxle, and a Guard GT limited-slip differential. Additional modifications include a roll bar, a front mounted oil cooler, 911S-specification disc brakes, Koni dampers, a camber regulator, 15? Fuchs wheels, and low-back seats with G-Force harnesses.