Mercedes-Benz’ S-Class is already a class above when it comes to luxury sedans, and when it’s an AMG version of the S-Class, it’s even a step above that.

Florida-based RENNtech—the only AMG-derived tuner in the world—has taken the S-Class even further with its R-Performance Line, which boosts the S-Class up to 670 horsepower and 840 pound-feet of torque on top of its top-of-the-line exterior upgrades.

RENNtech decks out the S-Class in carbon fiber, and not just any carbon fiber, but meticulously engineered additions of the material designed and sculpted by the tuner’s in-house team, which means every piece, like the rear decklid spoiler, is created by RENNtech in the USA.

The wheels on the R-Performance Line are custom too. RENNtech’s squad optimizes the wheels for each chassis through rigorous testing. The bespoke wheels come in three different designs (10-spoke, split 5-spoke, and 15 spoke) and are forged from aluminum that comes in three finishes (brushed aluminum, brushed gunmetal, and titanium).

Customers get to make the AMG S-Class completely their own thanks to the R-Performance Line by adding as many options as they want to upgrade their vehicles, but why stop with just the decklid when you can have everything on down to the wheels made anew.