Recently updated on February 3, 2015 at 03:33 am
After the GMC Yukon, the current GMC Sierra has now also received the HPE650 tuning kit and the boss himself shows us in a video what the difference between the production model and the Hennessey Performance GMC Sierra is. The tuning package includes a 2,9 liter compressor, a new cooling system, an HPE camshaft, machined cylinder heads, a stainless steel exhaust system and the company's own Hennessey Performance engine software.
The result is plain and simple, a damn fast vice. The direct comparison with the equally strong as standard 6,2-liter Chevrolet Silverado clarifies the whole.