Garrett CHRA – G-Series II G25-585, P/N: 934074-5001S

The Garrett CHRA – G-Series II G25-585 delivers the next evolution in G-Series performance for enthusiasts who already run a Gen I G25 platform and want more from their existing setup. Built around new compressor aero technology, this CHRA is the ideal upgrade path for owners looking to extract additional flow and efficiency without replacing their proven Gen I compressor and turbine housings. Whether you’re chasing more top-end power or simply want the latest internals under a familiar housing, this is the component-level solution engineered for that exact purpose.

Specifications

• Garrett P/N: 934074-5001S
• 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
• 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
• Calibration Requirement: Calibration required to take advantage of increased flow for a horsepower upgrade
• 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

Performance & Application

This CHRA is purpose-built for Gen I G25 customers seeking a direct upgrade path, available as a complete turbo unit, a supercore, or as a standalone CHRA purchase. The new compressor aero technology behind G-Series II increases power and performance while delivering increased efficiency at high flow rates, making it well suited for builds pushing beyond the limits of the original Gen I flow characteristics. Because it retains compatibility with existing Gen I compressor and turbine housings, enthusiasts can upgrade internals without a full housing swap. Proper calibration is essential to fully realize the horsepower gains this increased flow capability enables.

Frequently Asked Questions

Downloads

• Garrett-G-Series-II-Product Flyer