Garrett 871388-5002S Supercore G-Series G25-660, Trim 65

Garrett G25-660 supercore — a balanced core assembly (centre cartridge with compressor cover and back plate) for building or rebuilding G-Series turbochargers.

It incorporates the latest Garrett G-series technology, featuring a CFD-optimized forged milled compressor wheel for maximum airflow and efficiency.

The high-flow compressor housing integrates a speed sensor port for precise monitoring, while dual ceramic ball bearings ensure rapid spool response and durability.

With MAR-M 1050 C turbine wheel material, this unit withstands extreme temperatures, making it suitable for motorsport and high-performance builds.

Additional features include water and oil cooling, four large water jacket ports, and twin piston rings for superior sealing and stability.

Specifications

• Frame: G25
• Bearing: ceramic ball bearing
• Rotation: reverse
• Compressor wheel: 54 mm inducer, 67 mm exducer, 65 trim, 0.7 A/R
• Turbine wheel: 54 mm inducer, 49 mm exducer, 84 trim
• Turbine wheel material: MAR-M alloy
• Power: up to 660 HP
• Displacement: 1.4-3.0 L

Features

• CFD-optimized forged milled compressor wheel
• High-flow compressor housing with integrated speed sensor port
• Reverse rotation (counterclockwise) configuration
• Dual ceramic ball bearing cartridges for fast response
• Includes -4AN oil restrictor fitting with 1 mm orifice
• Four large water jacket ports for efficient cooling
• Turbine wheel constructed of MAR-M alloy rated to 1055 °C
• Water- and oil-cooled design