2020-2026 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD 6.6L Gas ProCharger Stage II Tuner Kit

600+ crank horsepower for the 2020-2026 GM 6.6L gasoline HD truck

Add the power and torque your work truck deserves without giving up daily drivability. ProCharger's intercooled centrifugal supercharger package is engineered for the 6.6L gasoline V8 in Chevrolet Silverado and GMC Sierra 2500HD and 3500HD models. ProCharger advertises a 50-55% power increase and more than 600 crank horsepower from the complete system on pump gas, with smooth power that is well suited to towing, passing, and on-road or off-road use.

Stage II Tuner Kit: uses a dedicated 8-rib drive and Stage II intercooling for additional airflow and future power capacity.

Package highlights

• P-1SC-1 ProCharger in satin finish
• Dedicated 8-rib supercharger drive
• Stage II air-to-air intercooler
• ProFlow bypass valve
• Self-contained supercharger oiling
• No permanent engine modifications required
• Black or polished supercharger and bracket finishes available
• Optional helical gearset and P-1X upgrade

Tuner kit details

Includes the core supercharger, drive, intercooler, and mounting hardware without ProCharger tuning or fuel components. It is intended for professionally tuned, modified, alternative-fuel, or higher-power combinations. Final boost, fuel delivery, calibration, and emissions compliance are the purchaser's responsibility.

Important fitment requirements

This package is for the 6.6L gasoline V8 only and does not fit the 6.6L Duramax diesel. Exact year, Chevrolet/GMC model, 2500HD/3500HD series, drivetrain, cab/bed configuration, electrical architecture, VIN, fuel, and emissions use must be supplied before the order is released.

Part number: 1KA404-SCI

Shipping: This made-to-order package ships directly from ProCharger. A $160 ground-freight charge and $35 drop-ship fee apply. Expedited or non-contiguous U.S. delivery is quoted separately.