The Garrett G25-550 is a small-frame ball bearing turbocharger engineered for enthusiasts who demand big power without sacrificing the compact packaging needed for tight engine bays. Paired here with a stainless steel V-Band turbine housing, this configuration is built for builders chasing serious horsepower from a frame size that fits where larger turbos simply can’t. It’s the choice for those who want Garrett’s advanced G-Series technology without compromise.
Specifications
- Compressor Wheel Inducer: 48mm
- Compressor Wheel Exducer: 60mm
- Compressor Wheel Trim: 65
- Compressor Housing Inlet: 3 Inch Diameter
- Compressor Housing Outlet: 2 Inch Diameter
- Compressor Housing A/R: .70
- Turbine Wheel Inducer: 54mm
- Turbine Wheel Exducer: 49mm
- Turbine Wheel Trim: 84
- Turbine Wheel Material: Mar-M Alloy, 1050 Celsius Rating
- Turbine Housing A/R: .72
- Turbine Housing Inlet: 3 Inch O.D. V-Band
- Turbine Housing Outlet: 3.55 inch O.D. V-Band
- Bearing Type: Ball Bearing
- HP Capacity: 550HP
- Garrett P/N: 871389-5004S
- Alternate P/N: 858161-5002S
- Alternate P/N: 740902-0069
Performance & Application
Built around Garrett’s Ultra High Flow G-Series compressor wheel and an evolutionary aero G-Series turbine wheel, the G25-550 is engineered for builders pushing serious power out of a small-frame package. The Mar-M alloy turbine wheel delivers high heat resistance for demanding, high-load applications. This configuration, with its stainless V-Band inlet and outlet turbine housing, is suited for enthusiasts and shops who need maximum flow and durability without upsizing frame dimensions. It’s the right turbo for builds targeting big horsepower numbers while keeping compressor and turbine response tight for the frame size.
What’s Included
- Oil Feed (1mm) Restrictor Fitting to -4AN
- Two Coolant Fittings to -6AN
- Turbine Housing Inlet & Outlet V-Band Clamps
Frequently Asked Questions
- What HP can the G25-550 support?
- The Garrett G25-550 is rated to support up to 550HP from its small-frame package.
- Is this a ball bearing or journal bearing turbocharger?
- The G25-550 is an advanced small-frame ball bearing turbocharger.
- What is the A/R ratio of the turbine housing?
- This unit is equipped with a .72 A/R stainless steel V-Band turbine housing.
- What material is the turbine wheel made from?
- The turbine wheel is made from high heat resistance Mar-M Alloy with a 1050 Celsius rating.
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