The Garrett GT4508R ball bearing turbocharger is built for serious high-horsepower applications where response and top-end capacity both matter. Designed for enthusiasts pushing into four-digit horsepower territory, this unit pairs a ball bearing center section with a large-frame compressor and turbine combination to deliver the airflow needed for extreme builds. This listing is for the bare turbo core and housings only — the turbine housing pictured is not included, making it ideal for builders sourcing a custom or divided turbine housing to match their exhaust manifold setup.
Specifications
- Compressor Wheel Exducer: 108.0mm
- Compressor Wheel Inducer: 80.8mm
- Compressor Trim: 56
- Compressor Housing A/R: .69
- Compressor Inlet: 6″
- Compressor Outlet: 3.5″ slip-on connection
- Turbine Wheel: 87.0mm
- Turbine Trim: 85
- Bearing Type: Ball Bearing
- HP Capacity: Close to 1200HP
- Turbine Housing: Not Included
- Garrett P/N: 742581-5004S
- Also Known As: GT45R
- Alternate P/N: 451888-0028
Performance & Application
The GT4508R is engineered for builders chasing serious top-end power without sacrificing the quicker spool characteristics of a ball bearing center section. Its 56-trim compressor wheel and 85-trim turbine wheel combination is matched to a .69 A/R compressor housing to move the volume of air required to approach the turbo’s full horsepower potential. For builders wanting a different compressor housing footprint, a
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