Holset HE250W turbocharger – two different assemblies
The Holset HE250W is available in two distinct configurations. Model 1 uses a 10 cm² turbine housing and an undivided T3 Single inlet. Model 2 has a 6 cm² housing and a divided T3 Divided inlet. Compressor and turbine wheel dimensions and the outlet connection also differ, so select the complete assembly to suit your build.
- Both versions have an internal wastegate.
- 7-blade compressor wheel and 11-blade turbine wheel.
- 101 mm compressor housing inlet.
- Supplier-quoted 175–450 hp power class, depending on the setup.
Technical differences
| Specification | Model 1 | Model 2 |
|---|---|---|
| Compressor wheel dimensions | 48 / 70 mm | 52 / 70 mm |
| Compressor blade count | 7 | 7 |
| Turbine wheel dimensions | 59 / 52.5 mm | 59 / 49 mm |
| Turbine blade count | 11 | 11 |
| Turbine housing | 10 cm² | 6 cm² |
| Manifold connection | T3 Single, undivided | T3 Divided, divided |
| Outlet | V-band, HX35 type | V-band, 3.5 inch |
| Internal wastegate | Yes | Yes |
| Oil feed | M12 × 1.5 | M12 × 1.5 |
| Oil drain | STD T3/T4, 51 mm bolt spacing | STD T3/T4, 51 mm bolt spacing |
| Compressor housing inlet | 101 mm | 101 mm |
| Quoted power class | 175–450 hp | 175–450 hp |
Choose the version before ordering
The manifold flange and V-band outlet differ between versions. Check both manifold and downpipe compatibility. The shared HE250W name does not mean these assemblies can be swapped without changes.
This universal turbocharger requires adaptation to the build. Check available space, manifold and downpipe flanges and the oil line arrangement. Vehicle-specific bolt-on fitment is not specified.
The quoted power class is indicative and does not, by itself, determine the correct turbo for an engine.
Suomi

