BorgWarner EFR 6258 turbocharger cartridge (CHRA) with iron bearing housing. The 6258 is the smallest, fastest-spooling EFR turbo, pairing a 62mm forged-milled compressor with a low-inertia 58mm Gamma-Ti turbine for quick response, supporting up to about 440 HP. This is the center cartridge for rebuilding or assembling a 6258 turbo.
Specifications
| Type | Turbo cartridge (CHRA) |
| Model | BorgWarner EFR 6258 |
| Frame | B1 (small-frame) |
| Compressor | 62mm forged-milled |
| Turbine | 58mm Gamma-Ti (low inertia) |
| Power range | up to ~440 HP |
| Bearing housing | Iron |
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