ProCharger Stage II Intercooled Supercharger System with P-1SC-1 Head Unit - Global B ECM (2020-2026 Silverado / Sierra 2500 / 3500 6.6L) - 1KA414-SCI

Stage II Boost for 2020-2026 Silverado and Sierra HD 6.6L Trucks

If you want more from your 2020-2026 Silverado or Sierra 2500 / 3500 6.6L, the ProCharger Stage II Intercooled Supercharger System delivers the kind of heavy-duty performance gain that transforms how your truck pulls, passes, and responds under load. Built for Global B ECM-equipped HD trucks, this system is designed to produce 50-55% more horsepower, resulting in 600+ crank horsepower on pump gas.

This is a serious upgrade for truck owners who tow, haul, or simply want stronger real-world performance without giving up smooth drivability. From highway merging to loaded towing situations, the added boost and torque are immediately noticeable.

Stage II System for Higher Capacity and More Growth

The Stage II system builds on ProCharger's High Output package with the airflow and drive upgrades needed for heavier demand and more future power potential.

• Dedicated 8-rib drive belt
• 1500 HP air-to-air race intercooler
• Built for improved power capacity over the HO system
• Excellent foundation for future upgrades

600+ Crank HP with Heavy-Duty Usability

This setup is engineered to deliver big performance where HD truck owners actually use it. You get strong torque for towing, smoother passing power, and a more responsive truck overall, while still keeping the drivability needed for work and daily use.

• 50-55% HP gain
• 600+ crank horsepower
• Increased torque for towing and hauling
• Smooth power for on-road and off-road use
• Optimized for 10-speed transmissions

P-1SC-1 Supercharger - Proven Street and Truck Performance

At the center of the system is the P-1SC-1 centrifugal supercharger, delivering efficient airflow and proven reliability. This head unit is well suited for powerful street and truck applications where consistent boost, long-term durability, and upgrade potential matter.

• P-1SC-1 head unit
• Optional helical gear set for noise reduction
• Upgradeable to P-1X, D-1X, or D-1SC
• Designed for reliable boosted performance

Race Intercooling for Consistent Power Under Load

One of the biggest upgrades in the Stage II package is the 1500 HP air-to-air race intercooler. That added intercooler capacity helps keep charge temps under control and supports more consistent performance during towing, hauling, and extended heavy-use driving.

• 1500 HP-capable air-to-air race intercooler
• Improved cooling capacity over the HO system
• Helps maintain stable charge air temperatures
• Supports more repeatable power under demanding conditions

Complete System with Easy Installation and Long-Term Reliability

This is a complete turnkey supercharger system with tuning, designed for truck owners who want real performance without unnecessary complexity. It retains the factory intake manifold, is designed to be 100% reversible, and keeps maintenance simple.

• PCM tuning supplied
• Quick and easy install - DIY friendly
• 100% reversible, no permanent modifications
• Fuel mileage friendly under normal driving conditions
• Supercharger mounting location minimizes heat

Features

• P-1SC-1 centrifugal supercharger
• Stage II Intercooled Supercharger System
• Dedicated 8-rib drive belt
• 1500 HP air-to-air race intercooler
• PCM tuning supplied
• Retains factory intake manifold
• Quiet option for work truck and daily driver use
• Polished or black finish optional for supercharger and/or bracket
• Helical gear set option for noise reduction
• Head unit upgrades available including P-1X, D-1X, and D-1SC
• Low maintenance design
• Proudly made in the USA

Quick Specs

• Manufacturer: ProCharger
• Product Type: Stage II Intercooled Supercharger System
• Head Unit: P-1SC-1
• Engine: 6.6L V8
• ECM Compatibility: Global B ECM
• Vehicle Fitment: 2020-2026 Silverado / Sierra 2500 / 3500 6.6L
• Horsepower Gain: 50-55%
• Power Output: 600+ crank HP
• Boost: 7 psi
• Drive System: Dedicated 8-rib drive belt
• Intercooler: 1500 HP air-to-air race intercooler
• Tuning: PCM tuning supplied
• Factory Intake Manifold: Retained
• Warranty: 1-year standard supercharger warranty, optional 3-year
• Part Number: 1KA414-SCI

FAQs

What is the difference between the Stage II system and the HO system?

The Stage II system upgrades the HO package with a dedicated 8-rib drive belt and a 1500 HP air-to-air race intercooler, giving you more drive capacity and more intercooling headroom.

Is this system a good choice for towing and heavy-duty use?

Yes. This system is built to deliver stronger torque and smoother power under load, making it a great fit for towing, hauling, and other demanding truck use.

Fitment

• 2020 Chevrolet Silverado 2500HD 6.6L
• 2021 Chevrolet Silverado 2500HD 6.6L
• 2022 Chevrolet Silverado 2500HD 6.6L
• 2023 Chevrolet Silverado 2500HD 6.6L
• 2024 Chevrolet Silverado 2500HD 6.6L
• 2025 Chevrolet Silverado 2500HD 6.6L
• 2026 Chevrolet Silverado 2500HD 6.6L
• 2020 Chevrolet Silverado 3500HD 6.6L
• 2021 Chevrolet Silverado 3500HD 6.6L
• 2022 Chevrolet Silverado 3500HD 6.6L
• 2023 Chevrolet Silverado 3500HD 6.6L
• 2024 Chevrolet Silverado 3500HD 6.6L
• 2025 Chevrolet Silverado 3500HD 6.6L
• 2026 Chevrolet Silverado 3500HD 6.6L
• 2020 GMC Sierra 2500HD 6.6L
• 2021 GMC Sierra 2500HD 6.6L
• 2022 GMC Sierra 2500HD 6.6L
• 2023 GMC Sierra 2500HD 6.6L
• 2024 GMC Sierra 2500HD 6.6L
• 2025 GMC Sierra 2500HD 6.6L
• 2026 GMC Sierra 2500HD 6.6L
• 2020 GMC Sierra 3500HD 6.6L
• 2021 GMC Sierra 3500HD 6.6L
• 2022 GMC Sierra 3500HD 6.6L
• 2023 GMC Sierra 3500HD 6.6L
• 2024 GMC Sierra 3500HD 6.6L
• 2025 GMC Sierra 3500HD 6.6L
• 2026 GMC Sierra 3500HD 6.6L

Why Buy from Beefcake Racing?

Beefcake Racing is your trusted source for ProCharger supercharger systems and GM HD truck performance upgrades. We help truck owners choose the right combination for towing, street performance, and serious real-world use.

When you order from Beefcake Racing, you get knowledgeable support, proven performance parts, and a team that understands how to match the right system to your goals.

Email: sales@beefcakeracing.com
Phone: 1-855-827-7223

CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov