Mercedes-Benz has upped the ante on its SLS AMG super car for 2013. The gull-winged brute has seen its power output bumped to 583 Teutonic stallions (up from 563 horsepower in 2012). Torque remains the same at 479 pound-feet. Internal tweaks to the combustion pressure, among other things, are responsible for the power increases from the 6.3-liter V-8.
