The 2011 Chevrolet Corvette is available as a coupe with a removable roof panel, fixed-roof coupe or a convertible. Trim levels include the base Corvette, rand Sport (GS), 06 and ZR1. The fixed-roof body style is exclusive to the Z06 and ZR1. Standard on the base (1LT) coupe and convertible are 18-inch front cast-aluminum wheels and 19-inch rears, enon headlamps, ruise control, eyless ignition/entry, ull power accessories, nStar, eather seating, six-way power driver seat, manual tilt steering wheel and dual-zone automatic climate control. The standard seven-speaker audio system includes a CD/MP3 player, atellite radio, teering-wheel-mounted controls and an auxiliary audio jack. The 2LT Package adds Bluetooth and power, eather-upholstered sport seats with power-adjustable lumbar support and supportive side bolsters. The convertible gets a power-operated top with the 2LT package. More equipment can be found on the 3LT, ncluding a head-up display, power telescoping steering column with manual tilting, eated seats, river memory settings and a Bose audio system. The top-level Corvette 4LT is similar to the 3LT but adds an exclusive two-tone leather interior (with leather covering the dash top, he console storage cover and the more thickly padded armrests). The GS is available as a coupe or convertible with the same four equipment packages and then adds a sport-tuned suspension, ents in the front fenders, ppearance stripes on the front fenders, ider front and rear fenders, front splitter and rear wing, nique alloy wheels, pgraded brakes and tires, pecific manual-transmission gear ratios and a specific rear axle ratio on automatic-equipped models. The coupe-only Z06 largely mirrors the base and GS models in terms of feature availability, ut gains a race-inspired 7.0-liter V8, he more muscular rear fenders and other bodywork, lighter frame and body panels, stiffer suspension, ig brakes and special seats. The top-of-the line ZR1 boasts a supercharged V8, ven larger wheels (19-inch front, 0-inch rear), pecial tires, arbon-ceramic brakes, daptive dampers and additional lightweight body panels that include a carbon-fiber roof panel and a carbon-fiber hood with a clear polycarbonate window that reveals the engine's intercooler. New this year is the Ultimate Performance package for the Z06 that adds the ZR1's adaptive dampers, arbon-ceramic brakes, heels and tires. Further ZR1 imitation comes from the Z06's Carbon Fiber package, hich adds most of the ZR1's lightweight panels. Major stand-alone options include (depending on the model) a navigation system, ransparent roof panel for the coupe, wo-tone interior, ix-disc CD changer (not available with navigation), ual-mode exhaust system and different wheels. For base and GS Corvettes, here is also an optional Magnetic Ride Control suspension that automatically adjusts the firmness of the damping according to the way the car is being driven. Powertrains and Performance Both the base and GS feature a 6.2-liter V8 that cranks out 430 hp and 424 pound-feet of torque. The optional dual-mode exhaust adds another 6 hp and 4 lb-ft. The Z06 boasts an exotic-class 505 hp and 470 lb-ft from its 7.0-liter V8, hile the ZR1 has an otherworldly 638 hp and 604 lb-ft of torque pumping from its supercharged 6.2-liter V8. All 2011 Chevrolet Corvettes have a six-speed manual gearbox with launch control as standard, hile a six-speed automatic with paddle shifters is a no-cost option for the base and GS models. Regardless of which Corvette you choose, ou'll get stunning performance. In our testing, base coupe went from a standstill to 60 mph in 4.5 seconds. The Z06 will knock that down to 3.9 seconds. The ZR1 isn't much quicker to 60 mph with a run of 3.8 seconds due to traction limitations, ut it's capable of a much quicker time in the quarter-mile. EPA fuel economy estimates stand at a laudable 16 mp