Mercedes-Benz went to great effort to improve the power and efficiency of its SLK range for the 2009 model year facelift but for the guys at German tuner Brabus the output of the standard model was never going to be enough. That’s why for their latest custom kit for the facelifted SLK, Brabus engineers installed a new 6.1L version of the 5.5L AMG-prepped V8 and added a new aerodynamic bodykit to match.

In addition to the powertrain and aerodynamic enhancements, Brabus also modified the suspension settings, wheels and tires, and the interior. The list of aero mods includes a new front spoiler, custom fender panels and a new rear apron with a bootlid spoiler.

The new 6.1L engine developers a peak output of 445hp (327kW) and 635Nm – up from 360hp (268kW) and 510Nm in the stock model. When combined with Mercedes’ seven speed automatic gearbox and Brabus’ own limited-slip differential the modded SLK will sprint from 0-100km/h in just 4.3 seconds and reach a top speed of 305km/h.

Stopping power comes from six-piston aluminum fixed calipers and 355 mm vented and slotted discs in front and 300 mm discs with four-piston aluminum fixed calipers in the rear. These reside within optional 19in forged alloy wheels and sit on a suspension system lowered up to 30mm.