The Garrett GT28R turbine housing kit is configured with a T25 turbine inlet and a 5-bolt turbine outlet in a 0.64 A/R, cast from high-silicon (Hi-Sil) cast iron for heat durability. It bolts to the GT28R super core to complete the turbine-side assembly.
| Series | GT28R |
| Turbine Inlet | T25 |
| Turbine Outlet | 5-Bolt |
| A/R | 0.64 |
| Design | Free-float (non-wastegated) |
| Material | High-silicon (Hi-Sil) cast iron |
| Part Number | 827690-0003 |
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