Already bulging with power, the SLS AMG isn't the first car that comes to mind when thinking about cars in need of an engine upgrade. Yet, German tuner McChip-DKR has done exactly that, offering a Stage 1 power boost that ups output of the 6.3-liter V8 from 583 hp to 654 hp, with torque remaining at 479 lb-ft. The remapped ECU that provides the additional horsepower can be executed in a day and the price of the package is 3,199 Euros.