No 56k: Mercedes SLS Gullwing Images Leaked

It probably will. The engine being used is the world's most powerful naturally-aspirated eight cylinder engine. Well, at least that's what Jalopnik says

That would put it at over 575hp... I'm somewhat skeptical that it will put out that much power but we'll see.
 
NICE EXHAUST. It looks beautiful.
 
Correction, it would have to be over 625hp, forgot about the Ascari A10.
 
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