LAS VEGAS — If the Dark Knight drove a 2010 Camaro, this is what it would look like. Chevrolet rolled out a Camaro Black Concept for the 2008 SEMA Show that put a premium on menacing looks, including such touches as a matte-black-finished hood and ground effects.'Sinister' is the operative word here inside and out, according to Chevrolet. The Camaro Black Concept's cabin gets red LED instrument lighting and red footwell ambient lighting, along with black chrome trim accents, custom sill plates and leather-covered seats with gray accent stitching.The exterior has a revised, darker grille finish, an SS-model spoiler, tinted glass, 21-inch wheels with a darkened finish and HID headlights with unique red 'halo ring' color. Other details include a rear diffuser, RS taillights with dark-tinted lenses and a Brembo four-wheel disc brake package.This concept is mainly about appearance, since it is powered by a production 3.6-liter V6 that produces 300 horsepower.Inside Line says: It's amazing the changes that can be wrought to the Camaro with just an appearance package. — Anita Lienert, Correspondent