Additional racing modifications include a 3 in (76 mm) exhaust with Coast Fab mufflers, C&R racing aluminum radiator, and coolers for the engine oil, transmission and differential.
Original plans for the car included sharing the chassis with the Chevrolet Impala, which was to have switched to the Zeta platform.However, a 2007 energy law drastically changing the Corporate Average Fuel Economy forced GM to scuttle plans for replacing the W-Body Impala with the Zeta-based Impala.The all-new Camaro was originally scheduled to begin production in 2008 and to go on sale in the first quarter of 2009 for the 2009 model year, Chevrolet General Manager Ed Peper said the new Camaro "will appeal to both men and women, and unite customers with fond memories of previous Camaros with those who first experienced a Camaro" when the concept was unveiled in January.Following the development of the Zeta architecture and because of its position as the GM global center of RWD development, GM Holden in Australia led the final design, engineering, and development of the Camaro.With the inclusion of a high performance exhaust, headers, air intake system and replacement camshaft all developed by GM Performance Parts reflects the heritage that the COPO's of past brought to the tracks.
Other modifications include a Tremec six-speed manual transmission, Brembo brakes, Hurst short-throw shifter, 20-inch custom wheels, and a lowered ride height.
At a glance it would seem that the only difference between the coupe and convertible concepts would be the roof and Hugger Orange pearl tri-coat paint job with a pair of dark gray racing stripes, but this is not the case.
Besides the obvious convertible top, there are subtle changes to the exterior as well. The rear fenderlines drop off from the horizontal surface to the vertical surface a couple of inches farther out than on the coupe to keep proportions good and the rear spoiler was reshaped.
The SS with manual transmission is powered by the 6.2 L (6,162 cc or 376 cu in) GM LS3 V8 producing 426 hp (318 k W) at 5,900 rpm and 420 lbf⋅ft (570 N⋅m) at 4,600 rpm while the SS with automatic transmission is powered by a new variant of the LS3 called the GM L99 which produces 400 hp (300 k W) at 5,900 rpm and 410 lbf⋅ft (560 N⋅m) at 4,300 rpm.
This new L99 V8, not to be confused with the earlier LT-series L99, uses Active Fuel Management which enables the engine to run on only four cylinders during light-load driving conditions, such as highway cruising, to improve fuel economy.
The Camaro Black Concept features a matte black hood, tinted glass, HID headlamps with red "halo rings", a darker grille, dark-tinted taillight lenses, and 21 in (533 mm) wheels with a darker finish. It is powered by the 304 bhp (227 k W) 3.6 L (220 cu in) V6.