Garrett CHRA – G-Series II G30-725, P/N: 934116-5001S

The Garrett CHRA – G-Series II G30-725 is engineered for performance enthusiasts and tuners looking to extract more from their existing G-Series platform without replacing their turbine or compressor housings. Built on Garrett’s advanced compressor aero technology, this CHRA delivers a genuine upgrade path for Gen I G-Series owners who demand more flow and efficiency from a proven housing architecture. It’s the ideal choice for builders who want a drop-in core upgrade backed by Garrett engineering.

Specifications

• Turbine Wheel Material: Mar-M alloy
• Turbine Wheel Temperature Rating: Up to 1050° C
• Turbine Housing Material Temperature Rating: Stainless steel, rated up to 1050° C
• Compressor Flow Improvement: Up to 10% higher compressor flow compared to G-Series Gen I at peak pressure ratio and peak turbo RPM
• Rotation Configurations: Standard and reverse rotation 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: 934116-5001S

Performance & Application

This CHRA is purpose-built as a direct upgrade for existing Gen I G-Series turbo owners, available as a complete turbo unit, supercore, or standalone CHRA purchase depending on build needs. The increased compressor flow and improved efficiency at high flow rates translate directly into a higher horsepower ceiling once properly calibrated. Because it retains compatibility with Gen I compressor and turbine housings, shops and enthusiasts can upgrade internals without sourcing new housings. Calibration is required to unlock the additional flow potential and realize the horsepower gains this core is capable of delivering.

Frequently Asked Questions

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

G-Series II utilizes Gen I compressor and turbine housings but delivers up to 10% higher compressor flow compared to G-Series Gen I at peak pressure ratio and pe

Downloads

• Garrett-G-Series-II-Product Flyer