Camaro SS is powered by the 6.2L LT1 V-8 engine introduced on the Corvette Stingray. About 20 percent of the components are specific for the Camaro's architecture, including new, tubular "tri-Y"-type exhaust manifolds. It also offers advanced technologies such as variable valve timing, direct injection and Active Fuel Management (on automatic-equipped models) to help balance efficiency and performance. Output is SAE-certified at 455 horsepower (339 kW) and 455 lb-ft of torque (617 Nm), making it the most-powerful Camaro SS ever.
The LT1 engine is available with a standard six-speed manual transmission - with new Active Rev Match technology that "blips" the throttle for perfectly timed downshifts - or the Hydra-Matic 8L90 paddle-shift eight-speed automatic.
Both the 3.6L V-6 and 6.2L V-8 feature mechanical sound enhancers - resonators that direct induction noise from the engine bay into the cabin. Both engines are available with a dual-mode exhaust, which features electronically controlled valves that bypass the mufflers under acceleration, delivering improved performance and greater sound levels. With the dual-mode exhaust, drivers can personalize the exhaust sound, from a "stealth" mode to the most aggressive "track" mode.
Source: Chevrolet Press Release