Six Sweet Six-Figure Corvettes

Hennessey ZR750 Price: $129,080 and up
Power: 755 hp, 730 lb-ft of torque
Claim to fame: Standing on the shoulders of (blue) Devils We're not going to lie -- as it rolls off the assembly line in Bowling Green, Kentucky, the ZR1 has both the power (638 horsepower, 604 pound-feet of torque) and the price tag (MSRP: $109,130) to warrant a spot on this list. That said, for an extra $20,000, the folks at Hennessey Performance eke some incredible power from Chevy's super coupe with its ZR750 package. The ingredients for Hennessey’s recipe are few, but they do have a substantial effect on the already potent supercharged 6.2-liter LS9 V-8. A new supercharger gasket and reprogrammed engine computer are installed, as is a custom supercharger pulley, which helps bump boost from 11 to 15 psi. A K&N air filter is fitted, as are upgraded camshafts, high-flow catalytic converters, and stainless steel headers. Those revisions allow the tuned-up LS9 to throw down 755 horsepower at 6600 rpm, along with a stump-pulling 730 pound-feet of torque emerging at 4000 rpm. According to Hennessey’s crew, the ZR750 can blitz from 0-60 mph in 2.9 seconds, rocket from 0-150 mph in 13.1 seconds, and scream through the quarter-mile trap in 10.7 seconds at 139 mph. The ZR750’s top end is reportedly in the realm of 224 mph, but good luck finding enough straight and empty road to safely stretch the car anywhere near that limit. A lesser form of this package (yielding just 700 horsepower) is available as a mail-order kit for $4950, but those wanting the full 755 ponies need to hand a ZR1 over to Hennessey -- along with $19,950 -- to have the entire system installed in-house. If cost is for some reason an issue, we’d skip ordering the ZR750 nameplates. Not only will it save you a few bucks, but it will also render your car a veritable sleeper – relatively speaking, of course. Photos courtesy of Hennessey Performance