Under the hood is the same ZZ 502 big-block engine that was found under the hood in 2005. This TPI engine produces more than 400 horsepower and 650 lb-ft of torque. It’s lightweight and makes 600 lb-ft of torque “right off idle.” The engine is fitted with a custom-ground camshaft, headers, and a custom exhaust by Advanced Suspension Design. Other underhood mods include a York engine-driven compressor, 230-amp alternator (with milk jug tethered to it to keep water out), and a pair of Optima RedTop batteries. Power is routed through a 4L80E automatic transmission with shift kit, TCI stand-alone computer, and deep aluminum pan. The transmission is cooled by a rollcage-mounted Flex-a-lite cooler with fan. Power is split to the axles by an Advance Adapters Atlas four-speed transfer case and carried by a front Six States ‘shaft and a rear High Angle Driveline CV ‘shaft.