The Garrett G45-1125 is a purpose-built turbocharger for high-horsepower performance builds that demand serious top-end capability without sacrificing response. Designed for enthusiasts pushing extreme power levels, this unit pairs a large-frame compressor with a T4 divided turbine housing to deliver the flow characteristics required for aggressive boost strategies. It’s the choice for builders who need proven Garrett G-Series engineering behind a four-digit horsepower goal.
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, 1.01 A/R
- Bearing Type: Ball Bearing
- HP Capacity: 1125HP
Performance & Application
The G45-1125 is engineered for extreme performance applications where sustained high boost and maximum flow efficiency are the priority. Its ball bearing design supports aggressive boost levels while the 44-trim compressor wheel and 84-trim turbine wheel geometry are matched to maximize airflow at the top of the power curve. The T4 divided turbine housing is well suited to builds requiring strong exhaust pulse separation at elevated power outputs. This configuration is built for enthusiasts targeting the upper limits of horsepower capability rather than mild street applications.
Frequently Asked Questions
- What HP can the G45-1125 support?
- The Garrett G45-1125 is capable of supporting up to 1125HP.
- Is the G45-1125 a ball bearing or journal bearing turbo?
- The G45-1125 features a ball bearing design that supports aggressive boost levels.
- What turbine housing comes with the G45-1125?
- It comes equipped with a T4 Divided turbine housing with a 1.01 A/R ratio.
- What is the compressor housing A/R on the G45-1125?
- The compressor housing A/R is 0.85.
For builds targeting extreme horsepower with proven Garrett G-Series engineering, the G45-1125 delivers the compressor and turbine geometry needed to get there.
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