This is not something anyone should be attempting on their own, let alone on a public highway. But whenever there's some sort of land speed record that can be broken, you're sure enough to find someone crazy enough to attempt it. Enter Diesel Power's Jason Sands. In this latest episode of "The Downshift", Sands attempts to break the Guinness World Record for the fastest speed when towing a trailer. His chosen chariot: a modified GMC
2500 HD truck with an output of over 1,000 horsepower.