Garrett CHRA – G-Series II G35-990 Reverse Rotation, P/N: 934125-5001S

The Garrett G-Series II G35-990 Reverse Rotation CHRA represents the next evolution of the proven G-Series platform, built for enthusiasts and tuners who demand more from their existing G-Series Gen I setup. Engineered with new compressor aero technology, this CHRA delivers a direct, drop-in upgrade path for Gen I owners looking to unlock additional flow and performance without replacing their entire turbo system. It’s the smart choice for builders who already trust the G-Series lineage and want to push their platform further.

Specifications

• Turbine Wheel Material: Mar-M alloy, rated up to 1050° C
• Turbine Housing Material: Stainless steel, rated up to 1050° C
• Rotation: Reverse rotation configuration
• Compressor Flow Improvement: Up to 10% higher compressor flow compared to G-Series Gen I at peak pressure ratio and peak turbo RPM
• 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: 934125-5001S

Performance & Application

This CHRA is purpose-built as an upgrade path for existing G-Series Gen I turbo owners, available as a complete turbo unit, supercore, or standalone CHRA purchase to fit your build strategy. The new compressor aero technology increases both power and performance while delivering increased efficiency at high flow rates. Calibration is required to fully take advantage of the increased flow for a horsepower upgrade, making this a serious component-level upgrade for platforms already running G-Series hardware. The reverse rotation configuration and Mar-M alloy turbine wheel construction reflect Garrett’s engineering focus on durability under sustained high-temperature operation.

Frequently Asked Questions

What makes the G-Series II different from the G-Series Gen I?

The G-Series II features new compressor aero technology that increases power and performance, delivering 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.

Can I upgrade my existing Gen I turbo with this CHRA?

Yes, this is a direct upgrade path for Gen I customers, available as a complete turbo unit, supercore, or with just a CHRA purchase.

Do I need to do anything else to see a horsepower gain?

Downloads

• Garrett-G-Series-II-Product Flyer