If you own a Chevy Silverado HD or GMC Sierra HD equipped with the naturally aspirated GM 6.6L V8 L8T gasoline engine and you simply need more torque, Whipple has a solution. The aftermarket performance company recently announced that it is now taking orders for its new supercharger kit designed for heavy-duty GM trucks produced between the 2020 and 2022 model years. Properly installed, the kit ups the ante with an impressive 700 pound-feet of torque.
For those readers who may be unaware, the Chevy Silverado HD and GMC Sierra HD pickups are both offered with the naturally aspirated 6.6L V8 L8T gasoline engine, rated at 401 horsepower at 5,200 rpm and 464 pound-feet of torque at 4,000 rpm in stock guise. As such, a rating of 700 pound-feet of torque with the new Whipple supercharger equates to gains of 236 pound-feet over the factory configuration.
The new supercharger kit for the GM 6.6L V8 L8T gasoline engine features Whipple’s fifth-generation twin-screw design, a 112 mm front feed inlet, a cast-aluminum high-flow intake manifold, high-flow water system, and billet idler plate and adjustable idler system. The charge air is kept cool thanks to an air-to-water bar-and-plate intercooler, which includes billet 6061-T6 tanks and super high-density fins.
Whipple claims the setup drains less than one horsepower of power while cruising, which means fuel economy shouldn’t be drastically affected, depending on how you drive. What’s more, the system includes a dual-pass heat exchanger, providing “incredible recovery time and consistent cool temps” while daily driving or towing.
The kit also offers the HP Tuner RDT flash tool and VCM scanner for data logging and a tire / axle adjustment. The supercharger looks good as well, sitting on top the GM 6.6L V8 L8T gasoline engine in a number of available finishes.
Critically, this kit is emissions-legal in all 50 states, and includes CARB Executive Order #D-231-79. Pricing starts at $7,495, per Whipple’s website. The PCM upgrade and RDT tool tacks an additional $1,000 to the price tag.