The new Z06 arrived as a 2006 model in the third quarter of 2005. It has a 7.0L version of the small block engine codenamed LS7. At 427.6 cubic inches, the Z06 was the largest small block ever offered from General Motors. Because of the Corvette's former use of 427 cubic-inch big blocks in the late '60s and early '70s, the LS7's size was rounded down to 427 cubic inches. Officially certified output is 505 bhp (377 kW) and has a 0-60 mph (97 km/h) time of 3.8 seconds and a top speed of 198 mph (319 km/h.
For 2008, the Corvette received a mild freshening: a new LS3 engine with displacement increased to 6.2 L (380 cu in), resulting in 430 bhp (321 kW) and 424 lb·ft (575 N·m) (436 bhp (325 kW) and 428 lb·ft (580 N·m) if ordered with the optional performance exhaust). The 6-speed manual transmission also has improved shift linkage and a 0-60 time of 4.0 seconds, while the automatic is set up for quicker shifts giving the C6 automatic a 0-60 time of 4.3 seconds, faster than any other production automatic Corvette. The interior was slightly updated and a new 4LT leather-wrap interior package was added. The wheels were also updated to a new five-spoke design.
The ZR1 was formally announced in a December 2007 press statement by General Motors, where it was revealed that their target of 100 bhp (75 kW) per 1 L (61 cu in) has been reached by a new "LS9" engine with an Eaton-supercharged 6.2-liter engine producing a confirmed 638 bhp (476 kW).
In 2010, the historical Grand Sport name returned to the Corvette lineup as an entirely new model series. It combines the wide body from the Z06 with the standard C6 powertrain in coupe and convertible models. With suspension and brake upgrades, the Grand Sport replaced the Z51 option. A new launch control system was introduced for all models that allows for more optimal launch. The Grand Sport with manual transmission and launch control is capable of a 0-60 time in four seconds.
