The 2019 Chevrolet Corvette ZR1 is the ultimate Corvette, and now that Chevy is going the mid-engine route, it will forever be the best traditional front-engine Vette you can buy. If you thought 755 horsepower and 715 pound-feet of torque would be enough to keep Hennessey from wanting more, you're sadly mistaken.
These guys tend to be on the extreme side of power, and they've managed to extract 1,200(!) horsepower and 1,066 pound-feet of torque out of the Vette's 6.2-liter supercharged V8. This one is called the HPE1200, and it's one of three versions of the ZR1 you can upgrade to. The other two are called the HPE850 and HPE1000, with 850 and 1,000 horsepower respectively.
If you decide to go with the 1,200-horsepower monster Corvette, you should know that it requires race fuel to get all 1,200 ponies. You'll still get 1,100 horsepower running on 93 octane, though. Hennessey does a whole lot of modifications to get the ZR1 up to this power output. They use a ported factory supercharger, lower and upper pulley upgrades, a custom camshaft, ported cylinder heads, upgraded intake and exhaust valves, better valve springs and retainers and a billet high-flow throttle body. All the exhaust gases get pushed out through stainless steel headers and high-flow catalytic converters. Hennessey upgrades the optional automatic transmission to handle the power, but says the stock manual seven-speed doesn't require any changes. There are no suspension or braking changes, but it's not as though the ZR1 is lacking in these areas. Lastly, your stupid fast ZR1 gets a 3-year 36,000-mile warranty direct from Hennessey.
Hennessey doesn't quote acceleration numbers for the 1,200-horsepower car, but the HPE1000 is rated for 0-60 mph in 2.3 seconds with the optional drag radials. It does the quarter mile in 9.4 seconds at 147 mph with those same tires. Top speed is a ridiculous 230 mph. The 1,000-horsepower ZR1 has almost all the same upgrades as the HPE1200, but drops the ported supercharger, high flow throttle body and race fuel capability. The HPE850 is mostly just bolt-ons, with no internal engine modifications to speak of.
Pricing and timing is available upon request from Hennessey.