The 2012 COPO Camaro is powered by the COPO 327 engine that features a 4.0L Whipple supercharger, for an NHRA-certified output of 550 horsepower. The 2012 COPO Camaros were also available with a supercharged 327 engine featuring a smaller, 2.9-liter supercharger and a naturally aspirated 427 engine. All of the engines were assembled at GM's unique Performance Build Center, in Wixom, Mich., where the LS7 and LS9 production engines for the Corvette Z06 and Corvette ZR1, respectively, are built, along with select Chevrolet Performance crate engines.
All COPO Camaro were built by hand starting with hardware from the Oshawa assembly plant that manufactures regular-production Camaros, including the same "body in white" body shells racers can purchase from Chevrolet Performance to build their own dedicated race car. Each was fitted with an NHRA-approved roll cage and other safety equipment, along with racing chassis and suspension components - including a unique solid rear axle system in place of a regular-production Camaro's independent rear axle. The cars rolled off the line wearing lightweight Bogart racing wheels and Hoosier racing tires.
Source: Chevrolet Press Release