Extracting more power from an already potent car is no easy task. Only a handful of companies have the resources to reverse engineer today’s complex engine management, and to properly reinforce the driveline accordingly. Our friends at AMS Performance have made a name for themselves by exponentially increasing the output of everything they can get ahold of. AMG builds some of the world's fastest cars, but what if you demand more from your Mercedes-Benz? The 5.5-liter (M157) V8 can be found under the hoods of late model CLS63 and E63 AMGs, and from the factory they produce 577 hp and 590 lb-ft. By unlocking the computer’s operating system, they are able to dispense with the luxury-minded parameters, replacing them with what can only be described as “beast mode.”
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