The Garrett Supercore – G-Series II G42-1325C represents the next evolution in Garrett’s proven G-Series platform, built for performance enthusiasts and tuners seeking a genuine upgrade path from Gen I hardware. This supercore configuration delivers the core rotating assembly for builders who already have compatible housings or are executing a full turbo system upgrade. It’s engineered for those who demand the power of legends with the durability of champions.

Specifications

• Model: G-Series II G42-1325C
• Garrett P/N: 938339-5001S
• Turbine Wheel Material: Mar-M alloy, rated up to 1050° C
• Turbine Housing Material: Stainless steel, rated up to 1050° C
• Compressor Flow: Up to 10% higher compared to G-Series Gen I at peak pressure ratio and peak turbo RPM
• Rotation Configurations: Standard and reverse rotation available
• Housing Compatibility: Utilizes Gen I compressor and turbine housings
• Related Speed Sensor Kit: ATP-ACS-032

Performance & Application

This G-Series II Supercore is designed as a direct upgrade path for existing Gen I G-Series customers, available as a complete turbo unit, supercore, or standalone CHRA purchase. The new compressor aero technology increases power and performance while delivering increased efficiency at high flow rates. Calibration is required to unlock the full horsepower upgrade potential offered by the increased flow capability. Because it utilizes Gen I compressor and turbine housings, this platform offers a straightforward path for builders looking to extract more from their existing G-Series setup.

Frequently Asked Questions

What is the difference between G-Series II and G-Series Gen I?

G-Series II features new compressor aero technology that del

Downloads

• Garrett-G-Series-II-Product Flyer G40 42 45