The Garrett CHRA – G-Series II G35-990 is engineered for performance enthusiasts and shops looking to extract more from an existing G-Series platform without a full turbo swap. Built on Garrett’s next-generation compressor aero technology, this CHRA offers a direct, drop-in upgrade path for anyone already running Gen I G-Series hardware. It’s the ideal choice for builders who want more flow and efficiency while retaining their current housings and investment.
Specifications
- Model: G-Series II G35-990
- Compressor Flow: Up to 10% higher compressor flow compared to 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 Configuration: Standard and reverse rotation configurations available
- Housing Compatibility: Utilizes Gen I compressor and turbine housings
- Inlet V-Band Flange (For Turbo Manifold): ATP-FLS-350
- Outlet V-Band Flange (For Down-pipe): ATP-FLS-351
- Oil Drain Flange: ATP-FLA-010
- Oil Drain Gasket: GRT-GSK-008
- Oil Drain Fasteners: MIA-FST-034
- Boost Pressure Port Fitting: ATP-FTG-198
- Speed Sensor Kit: ATP-ACS-032
- Garrett P/N: 934122-5001S
Performance & Application
This CHRA is purpose-built as an upgrade path for existing Gen I G-Series customers, available as a complete turbo unit, a supercore, or as a standalone CHRA purchase depending on build needs. Because it retains compatibility with Gen I compressor and turbine housings, it slots into current setups while delivering increased efficiency at high flow rates. Realizing the horsepower gains from the added flow requires proper calibration, making this a natural fit for tuned, performance-focused builds rather than stock applications. The available standard and reverse rotation configurations give builders flexibility to match turbo orientation to their specific installation.
Frequently Asked Questions
- How much more compressor flow does the G35-990 offer over Gen I?
- It delivers up to 10% higher compressor flow compared to G-Series Gen I at peak pressure ratio and peak turbo RPM.
- Do I need to retune after installing this CHRA?
- Yes, calibration is required to take advantage of the increased flow for a horsepower upgrade.
- What is the turbine wheel made of and what temperature is it rated for?
- The turbine wheel is a Mar-M alloy rated up to 1050° C, and the stainless steel turbine housings share the same 1050° C rating.
- Can I use my existing Gen I housings with this CHRA?
- Yes, G-Series II utilizes Gen I compressor and turbine housings, and it’s offered as a complete turbo unit, supercore, or CHRA-only purchase for a direct upgrade path.
For Gen I G-Series owners seeking a genuine flow and efficiency upgrade without abandoning their existing housing investment, the Garrett G35-990 CHRA delivers a proven, direct-fit path forward.
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