The Garrett G-Series G45-1125 is a high-output turbocharger unit built for serious performance enthusiasts pushing extreme boost levels on demanding builds. Featuring a T4 divided turbine housing, this unit is engineered for those who need proven G-Series efficiency and massive power capacity in a single, ready-to-run package. This is the choice for builders who refuse to compromise on flow, response, or top-end capability.
Specifications
- Compressor Wheel Inducer: 67mm
- Compressor Wheel Exducer: 102mm
- Compressor Wheel Trim: 44
- Compressor Housing A/R: 0.85
- Turbine Wheel Inducer: 89mm
- Turbine Wheel Exducer: 82mm
- Turbine Wheel Trim: 84
- Turbine Housing: T4 Divided, 1.15 A/R
- HP Capacity: 1125HP
Performance & Application
Built on the proven G-Series platform, the G45-1125 is engineered for high-flow efficiency across extreme boost applications. The T4 divided 1.15 A/R turbine housing configuration is designed to support builds demanding serious power capacity. This unit is suited for enthusiasts and builders targeting maximum output without sacrificing the reliability inherent to the G-Series design.
Frequently Asked Questions
- What HP can the G45-1125 support?
- The Garrett G45-1125 is capable of up to 1125HP.
- What is the compressor housing A/R ratio?
- The compressor housing A/R ratio is 0.85.
- What turbine housing configuration does the G45-1125 use?
- It uses a T4 divided turbine housing with a 1.15 A/R.
- What is the compressor wheel inducer size?
- The compressor wheel inducer diameter is 67mm.
For builders demanding extreme power capacity backed by the proven G-Series platform, the Garrett G45-1125 delivers the flow and durability to get there.

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