OnStar operator gets confused after John Hennessey tests his Camaro Z/28 with 650 hp

Article by Christian Andrei, on October 22, 2015

Being able to customize one’s car is what most drivers want. Being John Hennessey sure has its benefits. He had the HPE650 package installed on his 2015 model Camaro Z/28, giving it exceptional performance and amazing aesthetics that he can truly call his own.

Of course, the HPE650 package is one that he himself has devised. One of the upgrade’s main focus areas is the performance of the 7.0-liter LS7 V8 engine that acts as the powerhouse of the Z/28 2015 model.

With a horsepower rating of 650 hp, Hennessey’s 2015 Camaro Z/28 rockets through straight roads with the speed not before seen with a Camaro Z/28, or any racing car in particular. In fact, when John Hennessey tested this muscle car to the limit, he received a call from OnStar in order to confirm that everything is ok. His answer will definitely amuse you!

Hennessey doesn’t have to worry about losing control or not being able to stop at the right time, since the carbon ceramic brakes the package brought to his car is capable of excellent stoppage. The car’s performance is supported by excellent aerodynamics.

This is all due to a combination of a large splitter and a lift-reducing underbody panel. Stability is ensured by the fender flares on the front and rear wheels of Hennessey’s Z/28. More stability comes from the extended rocker panels of the HPE650 package.

The package also brings a rear spoiler and functional diffuser to the mix, rounding out the aerodynamic features provided by the HPE650. More customization is brought to the interior by Hennessey’s HPE650 upgrade package.

It brings a matte-metallic finish to the interior trim of the Camaro Z/28. The finish, which is named Octane, brings a very distinctive look to the insides of the Z/28. Additional upgrades to the interior include a ZL1 flat-bottom steering wheel and standard Recaro seats customized for high-performance driving.

The seats are all given microfiber suede inserts, similar to the ones found in the SS and ZL1 coupe. The package’s racing-inspired features are completed by seat cutouts designed after five-point harnesses made for racing cars. The seats at the front can be adjusted manually.

The rear seats, on the other hand, feature high-density foam and do not have a seat-back pass through. The absence of steel mesh for the seats’ bottom parts and the use of this material reduced the car’s weight by nine pounds or four kilograms.

Oppenheiser said that they have decided to preserve the 2+2 configuration of the seating of the original Camaro Z/28 in designing the upgrade package.

Although they desired to achieve weight savings, they wanted to keep the flexibility of the said configuration and thus decided to replace the materials used in the rear seat to retain the 2+2 seating in the Z/28. He also noted that the 2+2 seating is important, to avoid putting the Z/28 in the same class as the Corvette two-seater of Chevrolet.

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