Hennessey Upped The Power In Denali By More Than 240 HP Article Written by : Legendary Videos Legendary Speed is dedicated to bringing you the very best Videos about Automobiles and Cool stuff.Check out our other amazing pages LegendarySpeed, LegendaryFinds, Legendary Motorcycle, Amazing Rides, follow us on Instagram and Youtube.Subscribe to our newsletter and check out our daily finds where we dig up the coolest cars and trucks for sale. Thanks for visiting our site, we really appreciate it, you can help by giving us a like and a share on our social media platforms. Hennessey is absolutely mental. It produced the fastest American car of all times and they are known for producing great tuning kits. Now, they’ve released a tuning kit for the GMC Denali Yukon which powers up the car by more than 240 HP. Now, a full sized SUV can hit 60 mph in 4.5 seconds. And yes, listen to that 6,2 V8 rumbling beneath that hood. NEXT PAGE That was really over the top. What do you think of this next video?