Looking to offer enthusiasts more options for customizing the new 2012 BMW 6-Series Coupe, AC Schnitzer will unveil its new tuning program for the 650i at this week's 2011 Essen Motor Show in Germany.
Dubbed the ACS6 5.0i, the package includes a performance upgrade with unspecified modifications for the 4.4-liter turbocharged V8 engine that help lift output from 407HP to 540-horses.[...]
Source: Carscoop