Brabus has raised power in the Mercedes-AMG C63 S up to an impressive 591 bhp via its new PowerXtra B40 kit. The extra 88 bhp comes from an engine remap that adjusts injection and ignition as ...

Time will tell if AMG really does go back to V-8s, though. But in the meantime, make sure you check out our thoughts on the four-cylinder-powered C63 S E Performance on sale today. A Michigan-born ...