Mercedes-Benz SL65 AMG Black Series by Renntech

Enticed by the Brabus Vanish, one-of-a-kind, Renntech is glad to help out. The Florida-based Mercedes tuner par excellence has taken on the SL65 AMG Black Series, and the results are even more impressive than those garnered by rival tuning house Brabus. Five horses more, but more nonetheless.

With a simple tweak to the engine’s computer, intercooler and exhaust system, Renntech has squeezed out an extra 135 horsepower and 263 lb-ft of torque from the twin-turbo V12 for a grand total of 865 hp and 1,000 pounds of twist. The upgrade costs $16,390, which may seem like a big chunk of change, but it’s a drop in the bucket against the car’s quarter-million-dollar stock list price. The highly recommended upgrades to the transmission and differential will set you back a little extra, though.