2016 Ford Mustang Shelby GT350 HPE575


Not content to leave well enough alone, Hennessey Performance Engineering has added more power to the already potent 2016 Ford Mustang Shelby GT350. While Hennessey is known for adding big power via forced induction, the 2016 Ford Mustang Shelby GT350 HPE575 makes more power via naturally aspirated methods.

Where the stock 2016 Ford Mustang Shelby GT350 and 350R coupe’s 5.2-liter Voodoo V-8 makes 526 hp at 7,500 rpm and 429 lb-ft of torque at 4,750 rpm, Hennessey has boosted power to a flywheel-estimated 575 hp at 7,700 rpm and 511 lb-ft at 4,600 rpm. That’s an increase of 49 hp (at 200 rpm higher) and 82 lb-ft (at 150 rpm lower) than the stock engine. Peak horsepower is still well below the engine’s stock 8,250-rpm redline.


Power increases come via better breathing through stainless steel long-tube headers with 1.75-inch primaries and a stainless steel exhaust mid-pipe with high-flow catalytic converters. Hennessey ties the new high-flow exhaust bits together with an HPE engine management upgrade and chassis dyno tune as well as a 100-mile road test.

Hennessey will also change the oil and filter with Pennzoil Ultra Platinum synthetic oil and provide a full tank of Shell V-Power Nitro+ 93 octane gasoline.

Hennessey’s estimated flywheel power figures are based on before and after chassis dyno testing. Customers will also receive a before and after dyno graph showing horsepower and torque at the rear wheels.


In dyno testing, a stock 2016 Ford Mustang Shelby GT350 made 467 hp at 7,200 rpm and 374 lb-ft, while the carbon fiber wheel-equipped Shelby GT350R made 471 hp at 7,200 rpm and 376 lb-ft.

Other bits include the requisite visual enhancements, including a rear Hennessey exterior badge, HPE575 Powered by Hennessey badges on the sides and rear, Hennessey HPE575 serial-numbered interior plaque signed by John Hennessey, Hennessey HPE575 serial-numbered engine bay plaque signed by the HPE technician who worked on the car, and a serial-numbered Certificate of Authenticity signed by John Hennessey. A set of “Powered by Hennessey” floor mats and a free lifetime membership in the official Hennessey Vehicle Registry (HVR) are also included.


The 2016 Ford Mustang Shelby GT350 HPE575 naturally aspirated upgrade is priced at US$ 6,950 including installation and a 3-year/36,000-mile warranty. Do-it-yourself customers can mail order the parts for US$ 4,995 plus shipping without installation or warranty.

Hennessey will build just 100 examples of the Ford Mustang Shelby GT350 HPE575 for the 2016 model year with each vehicle having a unique XXX of 100 Hennessey serial number.