The new German Special Customs “Stealth” CLS63 AMG Tuning ProgramMay 17, 2012 • By Ryan Konko
German Special Customs has unveiled their latest “Stealth” Mercedes-Benz CLS63 AMG tuning program for the W218 generation of the four-door coupe. Even though it was given the “Stealth” name, it will have a difficult time sneaking under the radar as it cruses through the streets, that is, of course, unless it isn’t putting its 750 horsepower to work and flying by too fast to be seen.
Under the hood of the AMG lies a 5.5-liter V-8 engine with two big turbochargers feeding vast amounts of boost to all eight cylinders. German Special Customs designed their CLS63 AMG tuning program to utilize two new, bigger turbochargers. To keep things cool in the engine bay, a new water cooler was added for the charge air intercooler system. A new steel exhaust system helps to reduce backpressure for less turbo lag, and the ECU was tuned to accommodate the increase in boost pressure. The end result of the upgrades is an impressive 750 horsepower and 848 lb-ft. of torque. The additional power propels the four-door coupe to 62 mph in a mere 3.7 seconds and to a top speed of 217 mph (350 km/h).
The “Stealth” CLS AMG tuning program from German Special Customs doesn’t exactly blend in with traffic with its wide, commanding looks. The front was modified with a new bumper with integrated LED daytime running lights, a black grille with the German Special Customs badge, and a new hood that features a large vent to dissipate heat from the engine bay. New front and rear fenders along each side feature air vents to cool the braking system and are connected by a pair of skirts to calm the airflow around the wheel wells. The rear of the “Stealth” CLS63 AMG tuning program features a wider bumper with integrated carbon fiber diffuser to help improve high-speed stability.
German Special Customs did add a dynamic touch to the AMG-tuned suspension. The stock suspension up front was completely replaced with a new adjustable KW coilover system to allow drivers to optimize their ride for a certain track or road. New five-spoke wheels were also installed in a staggered 8.5 x 20 front and 10 x 20 rear fitment with 255/30R20 and 295/25R20 Continental tires.
The new German Special Customs “Stealth” CLS63 AMG tuning program may not be stealthy in everyday traffic, but who cares when you have 750 horsepower driving the rear wheels?
German Special Customs Stealth CLS63 AMG Tuning Specifications
Displacement: 5.5 liters
Number of Cylinders: V-8
Maximum Horsepower: 750
Maximum Torque: 848 lb-ft./1,150 Nm
-Additional water cooler
-Steel exhaust system
Acceleration 0-62 mph: 3.7 seconds
Top Speed: 217 mph/350 km/h
Wheels, Tires, and Suspension:
Wheels: Five-spoke alloy
Front Wheels: 8.5 x 20
Rear Wheels: 10.0 x 20
Front Tires: 255/30R20
Rear Tires: 295/25R20
Suspension: Front adjustable KW coilovers
-Front bumper with integrated LED daytime running lights
-Extended front fenders with vents
-Black grille with German Special Customs badge
-New hood with air vents
-Extended rear fenders with vents
-New rear bumper with integrated carbon fiber diffuser
German Special Customs Stealth CLS63 AMG Tuning Gallery
[Source: German Special Customs]