Renntech lowered the car, and completely redid the rear subframe and rear lower wishbone, as well as affixing performance sway bars to the front and rear.

With 100 hp/ton more than the big Mercedes-AMG performance machine, the Mini destroys the German in the first few yards of the mandatory 440 of the race ...

The ad for today's SL600 claims the car's twin-turbo V12 has been massaged by RENNTech, resulting in a 635-horsepower output.

The Mercedes C63S is a rare mix of style and nerdery This sports sedan combines, power, tech and safety in an elegant package.

But the RENNtech AMG GT 63 RIIIx could probably wipe the floor with it in a head-on drag race thanks to blasting no less than 1,196 hp and 927 lb-ft (1,257 Nm) on 100 octane fuel.

The 2017 Mercedes AMG C63S is not my first romance with a coupe, believe me. That would be the 2012 model of the car, in the Black Series trim—a stripped-down, steroidal two-door that carried ...

Renntech’s fortifications to the 6.2-liter engine puts it into the class of the 600-hp supercharged M3s that have been featured recently in this magazine.