2020-2025 GM 2500/3500HD Truck 6.6L L8T Gen 6 3.0L Whipple Supercharger Kit

2020-2025 GM 2500/3500HD TRUCK 6.6L L8T
GEN 6 3.0L WHIPPLE SUPERCHARGER KIT

Heavy-duty truck owners need more than just peak horsepower. They need low-end torque, dependable drivability, and power that holds up under load. That is exactly what a properly engineered Whipple twin-screw supercharger system delivers, transforming the 6.6L L8T platform with stronger throttle response, broader power delivery, and the kind of pulling power that can be felt whether the truck is towing, hauling, or simply being driven every day.

Whipple Superchargers has been at the forefront of twin-screw supercharging technology since 1987, engineering some of the most powerful and efficient forced-induction systems in the industry. That experience carries directly into the Gen 6 3.0L system for the 2020-2025 GM 2500HD and 3500HD truck platform, delivering substantial power gains in a complete bolt-on package designed for real-world truck use.

At the center of the system is Whipple's Gen 6 3.0L twin-screw supercharger, designed for strong airflow, immediate boost response, and broad torque throughout the RPM range. On qualifying applications, the system is capable of producing up to 685 horsepower and 695 lb-ft of torque. The large displacement compressor, integrated inlet design, and intercooler system work together to help the L8T deliver stronger performance throughout the usable powerband.

To support that performance, the package uses a massive oversized heat exchanger, high-flow intercooler pump, intercooler reservoir, and complete low-temp intercooler circuit to help maintain lower air charge temperatures under demanding conditions. The kit also includes the components required for clean installation and calibration support for compatible Global A and Global B applications.

When used as intended, the result is a serious heavy-duty truck upgrade with improved towing performance, stronger drivability, and repeatable power in a 50-state legal package for qualifying applications.

Key Features:

• 50-state legal performance upgrade (CARB EO D-231-135)
• Up to 685 HP and 695 lb-ft of torque*
• Gen 6 3.0L Whipple twin-screw supercharger
• Built specifically for 2020-2025 GM 2500HD and 3500HD truck applications with the 6.6L L8T V8
• Integrated casting minimizes bolt-on pieces, adapters, leaks and flow restrictions
• Integrated Crusher™ venturi shaped inlet for maximum airflow capacity and minimal rotor cavitation
• Integrated Crusher™ 112mm round inlet outflows smaller 90 and 93mm inlets used on other Eaton-based systems
• Integrated Crusher™ 112mm round inlet supports optional 102mm throttle bodies
• Big Mouth Whipple Crusher™ plastic air inlet, or optional carbon fiber, for increased velocity and lower inlet temperatures
• Massive oversized heat exchanger and high-flow pump for improved cooling capacity
• Integrated design allows for an oversized intercooler core compared to smaller competing systems, helping reduce air charge temperatures and support more boost and timing on pump gas
• Massive air-to-water aluminum bar-plate intercooler offers excellent cooling capacity
• Whipple Superchargers oversized intercooled air-bypass system for strong burst-knock reduction and excellent fuel economy
• Self-contained oversized oil system for reduced oil temperatures under demanding conditions
• Zero turn inlet design reduces induction losses compared to rear inlet systems and 180-degree bends
• Discharge down design reduces pressure loss for more power at lower boost levels
• Top mount design helps maintain cooler operation than upside-down supercharger layouts
• More boost at the "hit" than other twin-screw systems
• Flat torque curve for strong towing and acceleration performance
• Supports compatible Global A and Global B applications
• Includes calibration support for compatible applications
• Designed for stock, unmodified, well-maintained engines
• Premium fuel only, 91 octane or better
• LT4 3-bar TMAP sensor included
• Denso ITV22 or NGK LTR7AIX-11 spark plugs gapped to .032"
• Whipple SC oil fill of 3.0 to 3.5 oz for the W185FF compressor
• Designed to work with the factory air box, factory MAF, and Whipple air inlet duct
• Aftermarket air boxes and ducts are not supported with the supplied calibration
• OEM quick-connect fittings for easier installation
• Available in wrinkle black, polish, or custom colors
• Instant boost at the touch of the throttle
• 3 minute pulley changes

Application Notes:

Supports compatible Global A and Global B applications.

PCM compatibility should be verified before ordering. E93 Global A Service Tag: 12692986. E93 Global B Service Tag: 12731976.

Disclaimer: *Power figures shown are based on optimal conditions with 93-octane fuel. Results may vary depending on vehicle condition, fuel quality, supporting modifications, weather, and dyno type.