• 2015 Dodge Charger Hellcat HPE800 By Hennessey

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Since its inception in the early 1990s, Hennessey Performance Engineering has been looking for ways to improve vehicles from just about every
brand available in the U.S, including GM, Ford, Chrysler, Ferrari, Porsche, and McLaren. The Texas-based company even managed to set an unofficial world record record for street-legal cars with the Hennessey Venom GT, a heavily modified 2015 Lotus Exige S Club Racer that hit 270.49 mph. Now, about a year after Dodge launched the 2015 Dodge Charger SRT Hellcat, the world’s fastest, quickest, and most powerful sedan, Hennessey announced plans to develop an upgrade package for Mopar’s four-door muscle car.

Meet the Dodge Charger SRT Hellcat HPE800, the sedan that promises to be as quick and powerful as a Ferrari supercar, yet cost less than $100,000.

The Charger Hellcat adds to Hennessey extensive lineup of modified American cars, which includes vehicles from Cadillac, Chevrolet, Dodge, Ford, and even GMC. Keep reading for the full rundown and stay tuned for updates as well be back as soon as we have them.

Continue reading to learn more about the Dodge Charger Hellcat HPE800 By Hennessey.

  • 2015 Dodge Charger Hellcat HPE800 By Hennessey
  • Year:
  • Make:
  • Model:
  • Horsepower @ RPM:
    805 @ 6200
  • 0-60 time:
    3.5 sec. (Est.)
  • Top Speed:
    205 mph (Est.)
  • car segment:
  • body style:


2015 Dodge Charger Hellcat HPE800 By Hennessey High Resolution Exterior
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2015 Dodge Charger Hellcat HPE800 By Hennessey High Resolution Exterior
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2015 Dodge Charger Hellcat HPE800 By Hennessey High Resolution Exterior
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Hennessey-prepped have never been about exterior upgrades, and the 2015 Dodge Charger SRT Hellcat is no exception to that rule. All body panels are just like they came from the factory and the only exterior add-ons you get from shop are the "Hennessey" emblem on the trunk lid and the "HPE800" badges just above the side skirts. The cool "Hellcat" logos are still present on the front fenders, if you’re nuts for details. Though this model is finished in black, you can have the Hellcat HPE800 in any color available for the sedan, as Hennessey won’t meddle with the paint that comes from the factory.

All told, the Hellcat retains its mild sleeper appearance even with the Hennessey updates, and the majority of people likely won’t notice the "HPE800" and "Hellcat" logos at first glance. If you love the Charger Hellcat for being inconspicuous, you’ll probably feel the same about the HPE800.


On the inside, the Charger SRT Hellcat HPE800 is as stock as they get, with only two exceptions: A pair of Hennessey embroidered head rests replace the standard units, and the dashboard receives a serial numbered plaque. The good news here is that the sedan’s interior is packed with all sorts of sporty goodies, such as a flat-bottomed, SRT steering wheel and bolstered front seats.


As you might have already guessed, this is where Hennessey does its magic, by tuning the Hellcat’s supercharged, 6.2-liter V-8 beyond the 707 horsepower and 650 pound-feet of torque provided by the stock engine.

Hennessey managed to squeeze a whopping 805 horsepower from the Hemi engine, which is 98 horses more than the stock sedan.

Why? Simply because there’s no such thing as too much horsepower at John Hennessey’s shop in Texas. By adding a new ECU, a high-flow air filter, a port-matched throttle body, upgraded tuning software and lower pulley, Hennessey managed to squeeze a whopping 805 horsepower from the Hemi engine, which is 98 horses more than the stock sedan.

There’s no word on performance figures yet, but it’s safe to assume the HPE800 needs only 2.8 seconds to hit 60 mph, making it a tenth-second quicker than the standard Hellcat. Also, the Hennessey-prepped four-door should need less than 11 seconds to run the quarter-mile. Given SRT doesn’t limit the top speed of its cars, the HPE800 could max out at more than 204 mph.

Well, it looks like the fastest, quickest and most powerful sedan on the market has just been given supercar powers.


2015 Dodge Charger Hellcat HPE800 By Hennessey High Resolution Exterior
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No word on pricing for this beast, but expect this upgrade to add at least $20K to the Charger Hellcat’s $63,995 sticker. Knowing Hennessey, the HPE800 won’t be built in more than 50 units. That’s a big challenge anyway, as Dodge is still struggling to meet demand for Hellcat-powered Chargers and Challengers.


Chevrolet SS HPE1000 by Hennessey

2015 Chevrolet SS HPE1000 By Hennessey Exterior
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Finding a competitor for the Charger Hellcat HPE800 is far from easy, simply because not many aftermarket companies provide upgrades for the sedan’s direct competitors. Forget about beefed-up versions of the 2015 Chevy Impala SS and the 2014 Ford Taurus SHO (that still come with warranty), that’s not going to happen.

The same company does provide, however, an HPE1000 upgrade for the 2015 Chevrolet SS. The Texas-based company replaced the 6.2-liter V-8 with a larger, 7.0-liter unit and a couple of ball-bearing turbochargers for an output of 1,000 horses. It comes with various other upgrades and a one-year of 12,000-mile warranty, and it’s probably as quick as the Charger Hellcat HPE800.

Find out more about the Chevrolet SS HPE1000 here.

Cadillac CTS-V HPE800 by Hennessey

2016 Cadillac CTS-V High Resolution Exterior
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Note: Standard 2016 Cadillac CTS-V Pictured here.

I know the 2016 Cadillac CTS-V is only a midsize, but it’s currently the most powerful American sedan you can buy from Hennessey that’s not a Charger Hellcat. Based on the new CTS-V four-door, it comes with the exact same upgrade as the Hellcat HPE800, with an 800-horsepower output. Yup, it’s a bit less powerful than the Hellcat and likely significantly slower (there’s no official data yet). It might not be as quick on the drag strip, but it’s definitely the fastest Cadillac you can buy with a three-year warranty.


Much like the 2015 Dodge Challenger Hellcat X built by Walsh Motorsport, the Charger Hellcat HPE800 is living proof that there’s no such thing as too much horsepower. It goes to show that no matter how impressive a factory-built muscle car is, there will always be an aftermarket company looking to add even more power. And if you think the HPE800 is crazy, you might want to know that Hennessey is also working on an HPE850 upgrade with 852 horses on tap.

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Ciprian Florea
Ciprian Florea
Senior Editor and Supercar Expert - ciprian@topspeed.com
Ciprian's passion for everything with four wheels (and more) started back when he was just a little boy, and the Lamborghini Countach was still the coolest car poster you could hang on your wall. Ciprian's career as a journalist began long before earning a Bachelor's degree, but it was only after graduating that his love for cars became a profession.  Read full bio
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