The Garrett Supercore – G-Series II G40-1250 is engineered for performance enthusiasts and tuners who already run a G-Series Gen I turbocharger and want a direct path to more power without redesigning their turbo system. Built on new compressor aero technology, this Supercore delivers a meaningful flow increase while remaining compatible with existing Gen I housings, making it an efficient upgrade for serious builds. It’s the choice for those who demand both the legendary power Garrett is known for and the durability to back it up.
Specifications
- Garrett P/N: 938272-5002S
- Product Type: Supercore
- Compressor Flow: Up to 10% higher than G-Series Gen I at peak pressure ratio and peak turbo RPM
- 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
- Speed Sensor Kit: ATP-ACS-032
- Calibration: Required to take advantage of increased flow for a horsepower upgrade
Performance & Application
The G40-1250 Supercore is purpose-built as a direct upgrade path for existing Gen I customers, offered as a complete turbo unit, a supercore, or as a standalone CHRA purchase. Thanks to new compressor aero technology, it delivers increased efficiency at high flow rates along with a notable compressor flow gain over the previous generation. With both standard and reverse rotation configurations available, it adapts to a range of turbo system layouts while retaining compatibility with Gen I compressor and turbine housings. This makes it ideal for enthusiasts looking to extract more performance from a proven G-Series platform without a full system overhaul.
Frequently Asked Questions
- How does the G40-1250 compare to the G-Series Gen I?
- It delivers up to 10% higher compressor flow compared to G-Series Gen I at peak pressure ratio and peak turbo RPM, along with increased efficiency at high flow rates.
- Is calibration required to see the benefits of this upgrade?
- Yes, calibration is required to take advantage of the increased flow for a horsepower upgrade.
- What rotation configurations are available for the G40-1250?
- It is available in both standard and reverse rotation configurations.
- What upgrade options exist for current Gen I customers?
- Gen I customers can upgrade via a complete turbo unit, a supercore, or with just a CHRA purchase, and the G-Series II utilizes Gen I compressor and turbine housings.
For Gen I owners seeking a calibrated, direct-fit path to greater power without sacrificing durability, the G40-1250 Supercore delivers proven Garrett engineering with a real-world flow advantage.
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