Brabus tunes new Mercedes twin-turbo V8s

Brabus has unveiled a new tuning program for the twin-turbo V8 engines used in the Mercedes CL/S550 and CL/S63 AMG. First up, the CL500 and S500 (CL550 and S550 in US) can be outfitted with the 490 PowerXtra CGI kit that enables the V8 engine to produce 490 PS (360 kW / 482 bhp) and 780 Nm (575 lb-ft) of torque, up from standard 435 PS (320 kW / 429 bhp). Furthermore, the 520 PowerXtra CGI