They have made some legendary performance upgrades and are currently offering upgrade packages for the Corvette C8. However, the Corvette C7 ZR1 is becoming more coveted by many enthusiasts in the second-hand market. The C7 Corvette Z06 and ZR1 models, both equipped with our H1000 upgrade, have consistently pushed the limits of speed and power, embodying the spirit of American muscle and innovation. This $67,000+ upgrade added a larger supercharger, forged engine internals, an upgraded fuel system, and revised camshaft, valvetrain, and cylinder heads. There’s the VENOM 1000, and now a Corvette C7 ZR1 tuned by Hennessey Performance. With the HPE1000 package, the C7 ZR1 pumps out 1000 hp and 966 lb-ft of torque from its supercharged 6.2L V8 LT5 engine, mated to either a 7-speed Tremec TR-6070 manual transmission or 8-speed GM 8L90 automatic gearbox. Cost of Mods ??? Ok what mods are needed to get my zr1 to 700 whp and how much will it cost me approximately? I will be paying a speed shop to do the work? Thanks For C7 owners or enthusiasts who want to up the ante on power and capabilities, Hennessey Performance offers a 1,000 horsepower upgrade package for the C7 ZR1 which takes the already powerful car to another level. Hennessey Performance ZR750 Engine Upgrade. Here are a couple images of a recently completed 2011 Chevrolet Corvette ZR1 with our ZR750 Performance Upgrade (Details Below). The vehicle came to us directly from the dealer for a customer in Maryland. If you ever wanted to own a vehicle SO fast that it almost scares you to drive, then the HPE1000 Corvette C7 ZR1 performance upgrade by Hennessey is your dream car. The Chevrolet Corvette C7 ZR1 is a formidable muscle car that has captured the hearts of car enthusiasts everywhere. However, for those seeking an even more thrilling experience, the H1000 package by Hennessey takes the ZR1’s already impressive performance to new heights. The package will bring the total power output of your C7 ZR1 to 1000 horsepower. We recommend that you watch the video below to see just what a C7 Corvette CR1 with 1000 horsepower is capable of.