sentences:  Additional features included five-spoke wheels, a dovetail spoiler, alternate grille, and other official GM accessory modifications.The Camaro GS Racecar Concept design was inspired by Mark Donohue's blue-and-yellow Trans Am Series Camaro.It features a carbon fiber hood, trunk lid, doors and fenders to keep weight down and is powered by an LS3 V8 engine mated to a Tremec TR-6060 six-speed manual transmission.