The new year has only just begun and there are already tuning firms out there ready to set the bar up as high as they can. For their part, German tuner Inden Design has created a new kit for the beautiful Mercedes SLS AMG that leaves the exterior and interior changes on the wayside to focus on performance instead.

Usually we like a little aesthetic tweak here and there, but we’re not going to complain if Inden Design wants to put all of their eggs in one performance basket. The tuning company made significant changes to both the engine’s ECU and exhaust system, adding sportskats and manifold, to boost the 6.2 liter V8 engine’s output by 52 HP. This leaves the sports car with 623 HP and 479 lb-ft of torque, up from 571 HP.[...]