2008 CHEVROLET SILVERADO 2500HD

OWNER: Reece Main HOMETOWN: Carthage, Illinois ODOMETER: 192,000 miles ENGINE: LMM Duramax (6.4L)

SHORT BLOCK: Internally balanced, de-stroked Callies Ultra Billet crankshaft, ARP main studs, Wagler Competition Products forged-steel I-beam rods, Ross Racing forged-aluminum fly-cut pistons, Sun Coast zerobalance flex plate, Diesel Technology Source Dominator series standard fire camshaft, Wagler pinned oil pump, PPE oil pan, Wagler billet water pump, O-ringed block

HEADS/VALVETRAIN: DTS Dominator series heads with CNC porting, dual valve springs, Wagler billet rocker arm bridges, Wagler 4130 chromoly pushrods, Mahle Wave-stopper head gaskets, ARP Custom Age 625+ head studs, Wagler billet-aluminum valve covers

FUEL: S&S Diesel Motorsport 250-percent-over injectors and 14mm CP3, FASS 260 gph Titanium system, RCD Performance sump

AIR: HSP Diesel compound turbo kit with S480 SX-E and S366 SX-E 3-inch intercooler piping, Max-flow Y-bridge, Mishimoto intercooler

EXHAUST: PPE high-flow, cast-iron manifolds and 2-inch stainless steel up-pipes, 4-inch downpipe, 4-inch axle-dump system with 7-inch MBRP tip

ELECTRONICS: Custom Tuning Team EFI Live via DSP5 switch, Fleece Performance Engineering Allilocker, Edge Insight CTS

TRANSMISSION: DTS Full Billet Race Allison 1000 with billet input, output and intermediate shafts, Goerend Transmission “R” billet stator, 2,200 rpm stall, triple disc converter, Goerend extra-capacity transmission pan, BD Diesel Xtrude auxiliary transmission cooler

HORSEPOWER: 1,000 rwhp (est.) TORQUE: 1,700 lb-ft (est.) TIRES: 305x50r20 Nitto NT420S WHEELS: 20x10-inch Fuel Mavericks SUSPENSION: Caltracs traction bars

STEERING: Cognito Motorsports extreme-duty tie rods and center link, weld-in idler brace, Bilstein steering stabilizer

Backing up the potent Duramax is a full billet race version of the six-speed Allison. Built by Diesel Technology Source, it’s graced with billet input, output and intermediate shafts, along with a billet C2 hub, billet P2 planetary and a Goerend extra-capacity transmission pan. Efficient power transfer begins with a model R billet stator triple disc converter from Goerend. Its 2,200 rpm stall speed is well-matched with the truck’s S366/S480 compound arrangement, which results in good overall drivability. Put together by Dermody Diesel in Murrayville, Illinois, the short-stroke, 390 ci Duramax in Reece Main’s ’08 Silverado is pretty serious. The rotating assembly (balanced at Wagler Competition Products) entails a 3.75-inch-stroke Callies Ultra Billet crank, Wagler forged-steel rods, Ross Racing forged-aluminum, fly-cut, 16:1 compression pistons, Fluidampr and a Sun Coast zero-balance flex plate. Diesel Technology Source Dominator series heads flow 25 percent more air than stock and bolt to the O-ringed block by way of ARP Custom Age 625+ head studs. Things are topped off with a custom compound turbo arrangement that is pieced together with help from HSP Diesel.