Hennessey Performance Engineering all started off back in 1991 with John Hennessey’s dream of entering the Pikes Peak Hill Climb. The first modified car? His brand new Mitsubishi 3000GT VR4 that he purchased specifically for modifying and racing at Pikes Peak. By the end of 1991, John Hennessey quit his environmental-based career and the foundation for what would become one of the greatest modification companies in the world – Hennessey Performance Engineering – was laid.

Starting with modifications to the Mitsubishi 3000GT, Dodge Stealth and even the Mazda RX-7, Hennessey built a following for himself, and what a following it was. He went on to create amazing models like the 1,000 horsepower, 2006 – 2012 Chevy Corvette Z06 HPE1000 and the 813 horsepower, 2009 – 2011 Nissan GTR800. Then there are monsters like the 1,244 horsepower, 2014 Hennessey Venom GT that tops out at 278 mph and the more recent 2015 Hennessey Venom F5 with 1,400 horsepower and an estimated top speed of 290 mph.

Of course, not all of Hennessey’s cars push out 1,000+ horsepower and do more than 250 mph, but they are all special to say the least. One of the most recent is the 2015 Ford Mustang Convertible HPE750 by Hennessey. This monster features an upgrade package that pushes the 5.0-liter V-8 to more than 700 horsepower. This upgrade package is one for the history books, as one 2015 Mustang GT – featured on Jay Leno’s Garage – became the first 2015 Mustang to top 200 mph with a verified speed of 207.9 mph.

Details of how many 2015 Mustang Convertibles have been equipped with the HPE750 upgrade haven’t been released, but according to Hennessey’s website, only 50 Mustang GT’s from the 2015 model year will be built. So, without further delay, let’s look at what the HPE750 Mustang Convertible is made of.

Continue reading to learn more about the Ford Mustang Convertible HPE750 By Hennessey.

  • 2016 Ford Mustang Convertible HPE750 By Hennessey
  • Year:
  • Make:
  • Model:
  • Engine:
  • Horsepower @ RPM:
  • Displacement:
    5.0 L
  • 0-60 time:
    3.2 sec.
  • Top Speed:
    200 mph
  • car segment:
  • body style:


2016 Ford Mustang Convertible HPE750 By Hennessey Exterior
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The exterior of the Mustang Convertible really isn’t all that modified. It maintained its stock, Triple Yellow finish, and you don’t get large, ridiculous upgrades to the fascias for example. Instead, the convertible is equipped with A CarbonAero Splitter up front, and CarbonAero Side Sills on each side skirt. A supercharged emblem has been added to the hood on the passenger side, and HPE750 emblems are attached to the side skirts just behind the doors on each side.

the car rolls on 19- or optional 20-inch Hennessey light-weight wheels that are equipped with Michelin Pilot Super Sport tires.

At the rear of the Stang a CarbonAero lip has been installed to the rear deck along with Hennessey and HPE750 emblems on the lid just above the taillights. To tie the package together, the car rolls on 19- or optional 20-inch Hennessey light-weight wheels that are equipped with Michelin Pilot Super Sport tires.

This is a clear example of less really being more, because these small additions add a unique look to the convertible without the harshness of excessive body upgrades.


2016 Ford Mustang Convertible HPE750 By Hennessey Exterior
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The HPE750 upgrade package doesn’t offer much for interior upgrades either, but that is because the real magic happens under the hood. Even still, the package added custom Hennessey Embroidered Headrests and Hennessey Premium Floor mats. The only other magic on the inside is a plate added to the dash that has the Hennessey name and a special serial number for authenticity.

Since the interior is largely unchanged aside from those modifications, the classic-style steering wheel, leather seating, and basic entertainment system remain. That’s alright though, as this package is more about power. Besides, the stock instrument cluster, center stack, and basic leather seating all fit the mustang rather well anyway.


2016 Ford Mustang Convertible HPE750 By Hennessey Exterior
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The drivetrain is where the HPE750 upgrade package really shines. For starters, the fuel system is receives an upgraded fuel pump, and upgraded high-flow fuel injectors. A 2.9-liter supercharger system that puts out nine pounds of boost and the on-board computer, which receives the HPE Engine Management calibration, to put all that extra fuel and boost to work.

All of these upgrades bring engine output to a whopping 774 horsepower at 7,000 rpm and 648 pound-feet of torque at 4,400 rpm.

To top it all off, a carbon fiber, high-flow air induction system replaces the stock air intake system and a plaque displaying the serial number is added to the engine bay. To help stop all of this motivation, the convertible is equipped with a front and rear Brembo Racing brake system that appears to include drilled and slotted, 15.1-inch rotors. The car also appears to have been fitted with the optional stainless steel exhaust system.

All of these upgrades bring engine output to a whopping 774 horsepower at 7,000 rpm and 648 pound-feet of torque at 4,400 rpm. The end result: a 0-to-60 time of just 3.2 seconds. That is two-tenths faster than the listing on Hennessey’s website for the GT coupe, which pushes out a quarter mile in just 10.9 seconds at 133 mph. To put all this into perspective, the stock GT pushes 420 horsepower and 390 pound-feet of torque.


Pricing for the HPE750 Mustang starts out at $59,500 including a base-model GT Mustang. The starting price of the convertible GT starts out at $41,800 – $9,500 more than the GT Coupe – so I would estimate the HPE750 Convertible starts out at $69,000, which is right around the end cost of the HPE750 Mustang that hit 207.9 mph on Jay Leno’s Garage.


2015 Dodge Challenger SRT Hellcat

2015 Dodge Challenger SRT Hellcat High Resolution Exterior
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The Dodge Challenger Hellcat has a completely different story than the HPE750 Mustang Convertible – it’s not even a convertible – but on paper, it is a worthy competitor. It starts out at $59,995, and for that money you get a 707-horsepower V-8 with an eight-speed automatic transmission. Torque output sits at 650 pound-feet and the car has a 0-to-60 time of 3.5 seconds. Top speed is estimated to be 199 mph and the car can hit the quarter mile in 10.8 seconds at 126 mph. Not quite as fast as the HPE750 Convertible, but certainly fun to drive and about 10 grand cheaper on the pocket book.

Read more about the 2015 Dodge Challenger SRT Hellcat here.

2014 Chevy Camaro Z/28 SC652 by Callaway Cars

2014 Chevrolet Camaro Z/28 SC652 by Callaway Cars Exterior
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2014 brought the return of the Z/28, but it came at a price. As a competitor, this one might be a little out of the price range, if you’re considering a $70,000 Mustang, but it is worth none-the-less. The car comes with a 7.0-liter, LS7 V-8 that puts out 652 horsepower and 620 pound-feet of torque. It has a quarter mile time of 11.5-seconds at 114 mph with an estimated top speed of 186 mph. The base Z/28 was priced starting at around $75,000, and Callaway’s SC652 package starts at $19,995, so you’re looking at a little more than $96,000 if you go for the optional air conditioning and six-speaker audio system. It may be a bit more expensive than the 2015 Hellcat and the HPE705 Convertible Mustang, but part of what you’re paying for is the Z/28 badge. Either way, it’s not a bad vehicle and it certainly puts out some worthy numbers.

Read more about the 2014 Chevy Camaro Z/28 SC652 by Callaway Cars here.


2016 Ford Mustang Convertible HPE750 By Hennessey Exterior
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To be quite honest, I’ve seen enough modified mustangs in my time – all these well-known shops grab up a Mustang and make their own limited-edition version. In 2015 alone, we already have one modified by Ford Racing and Roush, Petty’s Garage, Steeda, and MRT, among many others. That being said, the more I looked into this specific model, the more I began to like it. Maybe it’s the fact that it sticks with the stock Triple Yellow paint, or maybe it’s the lack of major modification to the interior and exterior. Either way, if you want power you have to pay for it, and Hennessey did an excellent job on this convertible Mustang. Personally, I would rather buy a base model and modify it myself, but there aren’t many people out there who can do the work themselves and manage to put together such a complete package like this. Well done Hennessey.

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    • Convertible body style

Press Release

• 774 HP 5.0L V8 engine
• 0-60 mph: 3.2 seconds
• Supercharger system producing 9 psi boost
• Hennessey CarbonAero carbon fiber front splitter, side sills, and rear lip spoiler
• Hennessey H10 light weight wheels with Michelin Pilot Super Sport tires
• Brembo racing brake upgrade, front and rear
• The HPE750 Supercharged Mustang is the first and only 2015 Mustang to attain a verified top speed of 200 mph. One such car recently ran 207.9 mph on Jay Leno’s Garage on CNBC.

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