Garrett 858161-5003S G25-660 Super Core Turbocharger Performance

Vehicle Fitment

• Universal turbo core - no specific year/make/model fitment

Features

• G25-660 Super Core turbocharger design
• High-flow forged compressor wheel for optimal efficiency
• Water- and oil-cooled center housing for durability
• Dual ceramic ball bearings for fast spool and long life
• MAR-M 1050°C turbine wheel for extreme thermal resistance
• Integrated compressor housing speed sensor port
• Lightweight, precision-balanced rotating assembly
• Compatible with custom turbine and compressor housings

Specifications

• Part Number: 858161-5003S
• Turbo Type: G25-660 Super Core (CHRA only)
• Maximum HP Support: 350-660 HP
• Recommended Displacement: 1.4-3.0 L engines
• Compressor Inducer/Exducer: 54 mm / 67 mm
• Turbine Inducer/Exducer: 54 mm / 49 mm
• Cooling: Oil & water-cooled center section
• Rotation: Standard clockwise

Included Components

• 1x Garrett G25-660 Super Core (CHRA only)
• 1x Oil restrictor fitting (-4AN)
• Various plugs and water fitting caps

Product Description

The Garrett 858161-5003S is a high-performance G25-660 Super Core turbocharger core designed for custom turbo systems and advanced engine builds. This Super Core unit does not include turbine or compressor housings, allowing experienced builders to tailor the integration to their specific application. Utilizing Garrett's advanced compressor aerodynamics and forged milled compressor wheel, the 858161-5003S delivers exceptional airflow and efficiency, supporting approximately 350-660 HP across a broad displacement range of 1.4 L to 3.0 L.

Featuring dual ceramic ball bearings and a water- and oil-cooled center housing, this turbo core is engineered for rapid spool response and long-term thermal stability under demanding conditions. The high-temperature turbine wheel provides excellent durability, while the integrated compressor speed sensor port enables real-time monitoring for custom setups.

As a Super Core unit, professional installation and custom fabrication are required. This makes the 858161-5003S ideal for performance shops and experienced enthusiasts building track cars, race engines, or bespoke turbo projects where tailored fitment and peak performance are the priority.