Some info on the motor:
Other than the wild induction system, the engine could pass as stock—but it’s not. The lift pump was modified to produce more flow,andthe CP4 injection pump received internal modifications to boost fueling. The modified injectors came from Bosch and featuredenlarged internal passages as well as different nozzles. The stock pistons were also modified to lower the engine’s compression slightly. Brien Fulton and Paul Niessen spent nights and weekends on the project, developing a race tune that would fuel to more than 3,400 rpm.
The induction system is one of the few parts of the truck that doesn’t incorporate stock parts, as the factory three-wheel (two compressor, one turbine) Garrett turbo was ditched in favor of a mammoth 75mm Garrett GT4202 running at 35 to 40 psi. To make the switch, new intake and exhaust piping had to be fabricated, as the GT4202 moves nearly twice as much air as the stock unit. The intercooling system is one of the coolest parts of the project and features two stock air-to-water intercoolers that draw from a huge ice-water tank located in the back of the truck. While the turbocharger and intercooler system may seem like overkill for 550 rwhp, durability is key in this application. The modified diesel would be running at wide-open throttle for miles on end, so the exhaust gas temperature had to be controllable.