Callaway Automobile has launched power upgrades for the newest GMC Sierra Denali, Yukon, and Yukon XL, as well as the latest Chevrolet Silverado.
There are two base versions of the upgrade that depend on the displacement volume. The SC480 kit targets 5.3-liter V8s, boosting them to 480 horsepower (358 kilowatts) and 645 Newton-meters (476 pound-feet) of torque. The SC560 kit is meant for the 6.2-liter engines, squeezing them for 560 hp (418 kW) and 750 Nm (553 lb×ft).
Both packages include a supercharger kit, a high-flow air intake system, and an ECU tune. Both come with a warranty valid for 3 years of 58,000 kilometers (36,000 miles).
Available extras include a sports exhaust system and custom wheel sets measuring 20 and 22 inches across.
Photos: Callaway Automobile