---
title: "Hennessey Upgrade Bumps 2020 Ford Mustang Shelby GT500 to Colossal 1,200-HP Mark"
description: "Just in case the standard car's output of 760 horsepower and 625 pound-feet of twist just isn't enough for you, Hennessey's got a 1,200-hp upgrade for the Mustang GT500."
date: "2019-09-02"
modified: "2019-09-02"
authors:
  - name: "Chris Chin"
    link: "https://www.thedrive.com/authors/chris-chin"
url: "https://www.thedrive.com/news/29649/hennessey-upgrade-kit-bumps-2020-ford-mustang-shelby-gt500-to-colossal-1200-horsepower-mark"
categories:
  - "Ford News"
  - "News"
  - "News by Brand"
tags:
  - "Coupe"
  - "Ford"
  - "Mustang Shelby GT500"
  - "sports car"
---

# Hennessey Upgrade Bumps 2020 Ford Mustang Shelby GT500 to Colossal 1,200-HP Mark

![](<https://www.thedrive.com/wp-content/uploads/images-by-url-td/content/2019/09/2020-hennessey-gt500-venom-2-min.jpeg>)
*\<em\>www.thedrive.com</em>*

Although the hot and new 2020 Ford Mustang Shelby GT500 isn’t available at dealers just yet, that didn’t stop famous Texas tuning firm Hennessey from sharing its soon-to-be-available upgrades for the flagship muscle car. That is, if the GT500’s supercharged V8, the most powerful stock supercharged eight-cylinder ever fitted to a factory production car [with 760 horsepower and 625 pound-feet of twist](<https://www.thedrive.com/news/28600/2020-ford-mustang-shelby-gt500-will-make-760-hp-and-625-pound-feet-of-torque>), just isn’t enough for you right out of the box.

Hennessey released details on its available upgrade options, which are tiered into three packages: the base Venom 850 kit, the midrange Venom 1000, and the flagship Venom 1200. The numbers correspond to the horsepower rating of each package.

https://youtube.com/embed/KbRAytd6Wh4

Beginning with the base Venom 850 kit, the package includes improved breathers for the [GT500's V8](<https://www.thedrive.com/news/26935/2020-ford-mustang-shelby-gt500-top-speed-will-be-limited-to-180-mph>) in the form of stainless-steel long tube exhaust headers, high-flow catalytic converters, a CNC-ported in-house supercharger with a pulley and belt upgrade, and a high-flow air intake system. Despite the seemingly modest “bolt-ons,” the result is a bump to 850 hp and 725 pound-feet, using 93 octane from Shell V-Power, as per Hennessey’s own testing.

![message-editor%2F1567373728884-2020fordmustangshelbygt500hennesseyupgrades2.jpg](<https://www.thedrive.com/wp-content/uploads/content-b/message-editor/1567373728884-2020fordmustangshelbygt500hennesseyupgrades2.jpg>)
**Hennessey**

Opt for the midrange Venom 1000 kit, and as indicated, you’ll get 1,000hp on the same fuel and 850 pound-feet thanks to a more intense 3.0-liter supercharger upgrade, a beefed-up intercooler, fuel system upgrades, and the same breathers as the Venom 850 package.

And the flagship Venom 1200 kit provides enough power to slow the Earth’s rotation: a whopping 1,200 hp and 1,000 pound-feet of twist on E85 or 109 octane racing fuel. With this kit, the folks at Hennessey swap out the supercharger arrangement for a twin-turbo setup with an uprated intercooler, fuel system, upgraded pistons and connecting rods, strengthened transmission, and upgraded intake and exhaust breathers.

![message-editor%2F1567373740918-2020fordmustangshelbygt500hennesseyupgrades1.jpg](<https://www.thedrive.com/wp-content/uploads/content-b/message-editor/1567373740918-2020fordmustangshelbygt500hennesseyupgrades1.jpg>)
**Hennessey**

All Venom packages come with serial-numbered dash and engine compartment plaques signed by [John Hennessey himself](<https://www.thedrive.com/news/27779/hennessey-tuned-ford-ranger-is-harder-better-faster-stronger-than-f-150-raptor>) along with professional installation, a thorough test drive consisting of 150 miles to confirm optimal function, and a limited one-year/12,000-mile warranty.

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