The Garrett CHRA – G-Series II G42-1325C is the rotating assembly heart of Garrett’s next-generation G-Series turbocharger platform, purpose-built for tuners and Gen I G-Series owners seeking a direct performance upgrade. It’s engineered for enthusiasts who already run Gen I compressor and turbine housings and want more flow and efficiency without replacing their entire turbo system. This CHRA delivers the core technology advancement that defines G-Series II performance.

Specifications

• Model: G-Series II G42-1325C
• Garrett P/N: 938338-5001S
• Turbine Wheel Material: Mar-M alloy, rated up to 1050° C
• Turbine Housing Material: Stainless steel, rated up to 1050° C
• Rotation Configurations: Standard and reverse rotation available
• Housing Compatibility: Utilizes Gen I compressor and turbine housings
• Compressor Flow Improvement: Up to 10% higher compressor flow compared to G-Series Gen I at peak pressure ratio and peak turbo RPM
• Upgrade Path: Available as complete turbo unit, supercore, or CHRA purchase
• Compatible Speed Sensor Kit: ATP-ACS-032

Performance & Application

This CHRA is designed for enthusiasts and builders already invested in the Garrett G-Series Gen I platform who want to unlock additional compressor flow and efficiency without sourcing new compressor or turbine housings. New compressor aero technology increases power and performance, with increased efficiency realized specifically at high flow rates. Calibration is required to take full advantage of the increased flow for a horsepower upgrade, making this a serious option for tuned, performance-focused builds. The Mar-M alloy turbine wheel and stainless steel turbine housing rating support sustained high-temperature operation for demanding appl

Downloads

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