German aftermarket firm KTW Tuning has unveiled its latest project based on the C63 AMG coupe, which it has cranked up to deliver 525 hp, up from the 451 hp the stock 6.3-liter V8 churns out. The tuner removed the speed limiter, enabling the C63 AMG to max out at over 190 mph, and the high-performance coupe was also completely blacked-out, including its new sports grille and 20-inch alloys. KTW Tuning rounded off the package by tinting the rear and side windows. The complete package is priced at 6,599 euros.