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Chevrolet Corvette ZR1: 1200bhp Hennessey Power

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By Dave Ashton

It seems Hennessey Performance are never content with letting a potent car pass by without adding some extra zing under the hood. The Texas based tuners have now added their upgrade packages to the Chevrolet Corvette ZR1. Thus, producing the most ridiculously powered ZR1 upgrades out there.

The ZR1 is already a very potent machine, and the zenith of modern ‘Vettes from a power and performance point of view. So, with an already sturdy platform of power, Hennessey provide three packages in the form of the HPE850, HPE1000 and HPE1200, with the top one providing 1200bhp and 1066lb ft of torque.

In its basic form, if you can call it that, the ZR1 already has a 6.2-litre supercharged V8 producing 744bhp and 715lb ft. of torque. That’s 62mph in only 2.9 seconds and a top speed of 210mph. Add in the first upgrade package HPE850 and a Vette will be bulked up to 850bhp and 715lb. ft. of torque with additions bits and an ECU upgrade.


The HPE1000 package gives 1000bhp, while the top HPE1200 package, provides the full 1200bhp on 93 octane fuel. There are plenty of tweaks to the factory supercharger and car as listed below and all packages come with a three-year or 36,000-mile warranty.

HPE1200 Package
HPE1200 Package Requires Race Gas*
• Ported Factory Supercharger
• Billet High-Flow Throttle Body
• Hennessey Upper Pulley Upgrade
• Hennessey Lower Pulley Upgrade
• High-Flow Air Induction System
• Custom HPE Camshaft
• Ported Cylinder Heads
• Upgraded Valve Springs and Retainers
• Upgraded Intake valves & Exhaust Valves
• Upgraded Lifters and Pushrods
• Long-tube Stainless Steel Headers
• Stainless Steel Midpipes
• High-Flow Catalytic Converters
• 8-Speed Automatic Upgraded Transmission*
• All Necessary Gaskets & Fluids
• Professional Installation
• HPE Engine Management Calibration
• Dyno Tuning & Road Testing
• Serial-Numbered Dash & Engine Plaques
• Hennessey Exterior Badging
• Hennessey Premium Floormats
• 3 Year / 36,000 Mile Limited Warranty
• Pennzoil Ultra Platinum synthetic oil & filter change
• Call Hennessey Performance for pricing and turnaround time details
* 7-Speed manual does not require a transmission upgrade.

Hennessey also provide these upgrade packages to other American-made muscle and European vehicles. Examples being the HPE1200 Demon Upgrade, HPE1000 Hellcat Redeye, HPE800 Supercharged for 2018 – 2019 Ford Mustang GTs and the ZL1 Camaro 1,000BHP Exorcist upgrade. Me thinks could the ZR1 HPE1200 Package be the next supercar killer?

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