The high-performance Camaro SS is equipped with a powerful 6.2L V8, with a choice of a six-speed manual or six-speed automatic transmission. The
standard manual transmission-equipped models receive the LS3 engine, rated a projected 422 horsepower and 408 lb.-ft. of torque. The LS3 debuted on the 2008 Corvette and uses high-flow cylinder heads based on the Corvette Z06 LS7 engine to enable great low-end torque and high-rpm power. It is paired with a TR6060 six-speed manual transmission.
A new, L99 engine is used on automatic transmission-equipped SS models. It is based on the LS3 and carries all of its high-performance design features, but also includes GM's Active Fuel Management technology. It enables the engine to run on only four cylinders during light-load driving conditions, such as highway cruising. The L99 is rated at a projected 400 horsepower and 395 lb.-ft. of torque and it is matched with a Hydra-Matic 6L80 six-speed automatic transmission with overdrive to deliver an estimated 23 MPG highway1.

CHEVY IS KING!
From [
http://www.chevrolet.com/camaro/insi.../?id=cid00018]