Brabus will showcase the B63S upgrade program for the 2014 Mercedes-Benz CLS 63 AMG and Shooting Brake in Geneva next week.

Besides showing the SL 65 AMG-based 800 Roadster, Brabus will also present this modified CLS 63 AMG. Under the bonnet is the same V8 5.5-liter engine but it now outputs an impressive 730 HP (537 kW) and electronically-limited 1,065 Nm (785 lb-ft) whereas the 2014 CLS 63 AMG S-Model provides "only" 585 HP (430 kW) and 800 Nm (590 lb-ft).

Brabus installed two custom turbochargers with larger compressor units for generating a higher boost pressure compared to the stock turbos. They also fitted an extra low-temperature water-to-air intercooler and remapped the engine's ECU. Free-flow metal catalysts with 75mm wide downpipes and a limited slip differential are also part of the package. The CLS 63 AMG and Shooting Brake also have a new sport stainless steel exhaust system with a butterfly valve and two ceramic-coated dual tailpipes.

Thanks to all these changes, the cars will do 0-62 mph (0-100 km/h) in 3.8 seconds, making it 0.6s faster than the standard CLS 63 AMG (non S-Model) and 0.7s quicker than the Shooting Brake. The S-Model is still faster, performing the sprint in 3.6 seconds for the four-door coupe and 3.7 seconds for the Shooting Brake. The stock versions are electronically-limited to 155 mph (250 km/h), but the Brabus CLS 63 AMG will do 217 mph (350 km/h) while the Shooting Brake is limited at 186 mph (300 km/h) "out of consideration for the tires".

The AMG SPEEDSHIFT PLUS 7G-TRONIC transmission has been retained, and wind tunnel-developed carbon fiber front spoiler and fender attachments with backlit logo have been fitted to both cars. Brabus offers a wide variety of 19- and 20-inch wheels, scuff plates with backlit logo, 400 km/h (250 mph) speedometer, wood and carbon fiber trims, rear-seat tables attached to the font seats' backs, as well as aluminum pedal pads, shift paddles and door lock pins.

Gallery: Brabus B63S based on Mercedes-Benz CLS 63 AMG heading to Geneva

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