Garrett 858161-5003S 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.

Featuring a CFD-optimized, forged milled compressor wheel, it delivers exceptional efficiency and airflow capacity within a compact design.

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

Designed with MAR-M 1050 C turbine wheel material, the turbo withstands extreme thermal conditions.

Specifications

• Frame: G25
• Bearing: ceramic ball bearing
• Rotation: standard
• 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
• Standard rotation configuration
• Dual ceramic ball bearing cartridges for faster response and durability
• Includes -4AN oil restrictor fitting with 1 mm orifice
• Four large water jacket ports for improved cooling
• Turbine wheel constructed of MAR-M alloy rated to 1055 °C
• Oil-cooled bearing system