The 2009 Chevrolet Corvette ZR1 marks the return of an ultra-high-performance model to this American sports car icon. The rest of the 2009 Corvette lineup is largely unchanged. ZR1 represents a revival of a moniker that graced super-performance Corvettes from 1990-1995. The 2009 version has a supercharged 638-hp 6.2-liter V8 engine. It teams with a 6-speed manual transmission. ZR1 also differs from other Corvettes by its unique suspension tuning and use of lightweight carbon fiber on the hood, roof panel, roof bow, front fascia splitter, and rocker moldings. As for the rest of the Corvette lineup, base models are available as a coupe or convertible. Convertibles have a soft top that folds with manual or power operation, depending on model or option selection. All base Corvettes have a 430-hp 6.2-liter V8 engine. An optional "dual-mode" exhaust system increases horsepower to 436. They're available with a 6-speed manual or a 6-speed automatic transmission. The high-performance Corvette Z06 is only available as a coupe and comes with a 505-hp 7.0-liter V8 and mandatory 6-speed manual transmission. Z06 models also have specific suspension tuning, tires, and brakes. Available safety features across the Corvette lineup include ABS, traction control, antiskid system, and front side airbags. Base models are available with GM's Magnetic Selective Ride Control that automatically adjusts suspension firmness within two driver-selectable modes. Also optional on base Corvettes is a high-performance Z51 package that has a firmer, nonadjustable suspension.