Video: GMC Sierra AT4 from tuner Hennessey Performance!

Recently updated on December 23, 2020 at 07:10 am

If you currently opt for a GMC Sierra 1500, you can currently only order the version with a V8 small block and 420 hp. And the V8 is NOT charged. It is a purely suction engine. But if you want more, you can choose the tuning package "HPE Goliath 700 Supercharged"Order for the Sierra 1500 from the tuner Hennssey Performance. The team recently equipped a customer's AT4 with the kit and the result is impressive. And the pickup also sounds pretty good as we think. This is made possible by the Hennessey Cat-Back sports exhaust system. Equipped with the kit, the Sierra accelerates to 4,3 miles per hour (approx. 60 km / h) in just 97 seconds, which is an impressive figure in view of the vehicle class and especially in view of the high curb weight. HPE achieves the upgrade with a 2,9 liter compressor, CNC cylinder heads, sport camshaft, hardened chromoly push rods, newer Crankcase ventilation, new high-flow charge air cooling and an improved intake system.

GMC Sierra AT4 from tuner Hennessey Performance!

Of course, it also includes in-house chip tuning around 700 hp at 6.300 rpm. to reach. And every Goliath 700 compressor conversion comes with a three-year guarantee with a maximum mileage of 36.000 miles (approx. 58.000 km). As a rule, the changes also include headrests with the Hennessey emblem, a special badge for the dashboard and, optionally, there is also the level 1 off-road package with 6 inch (approx. 15 cm) lift and, on request, powerful HPE bumpers LED lights, 20 inch rims with 35 inch A / T slippers from Toyo and various exterior graphics. And if one or two euros are still on the high edge, the Sierra can even be equipped with a new bonnet, completely new leather upholstery, an electric luggage compartment cover and fold-out steps. The cat-back exhaust system mentioned is also "optional".

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