Augmented fuel flow is supplied by HSM dual CP3s, fed by a FASS 150 lift pump, pushing sweet, sweet Number 2 through the factory injectors. Powertech Diesel’s own Brent Willsey handled the programming via EFI Live. Inside the cab, an Edge Insite CTS allows the operator to monitor the pumped-up Duramax’s vital signs.
On the hot side of things, exhaust fumes are evacuated through ATS manifolds and hot-coated up-pipes, through a Flo Pro muffler, and out an exhaust tip fashioned by Powertech Diesel. Citing similar builds, Powell estimates his engine’s output to be around 650 horses and a shade over 1,200 lb-ft of twist. Power and torque reach the ground via the trusted 2015 Allison transmission, whose only upgrade was a new ATS pan; the rear differential (3.73) is also fitted with an engraved ATS cover. Powell uses Amsoil lubrication exclusively to keep the gears turning smoothly.
Clean, Inside and Out
Keeping with the truck’s clean, low-profile theme, the exterior mods were integrated neatly into the Silverado’s existing lines and color-matched to the rest of the panels. A T-Rex X-Metal grille spearheads the Silverado’s forward progress. Fusion bumpers, imported from West Idaho, were placed front and rear. Both bumpers house Rigid Industries LED lighting, the front with dual staggered arrays on each corner, the rear with single lamps recessed on either side of the license plate well. Each bumper also features dual Monster tow hooks and another in the hitch receiver. The taillights were upgraded with high-visibility Anzo LEDs, including the addition of an LED stripe tucked beneath the tailgate. The bed was sprayed with Linex Premium and is isolated from the elements by a Truxedo Deuce tonneau cover