Tomei ARMS BX8280 Ball Bearing Bolt-On Turbo for Evo X (TB403A-MT02A)
The Tomei ball bearing turbo for the Evo X features a CNC billet compressor wheel made from aerospace-grade materials, with thinner blades for improved airflow and turbo spool, supporting approximately 450HP. The multi-rate billet actuator boasts a large capacity and reinforced forged billet construction, including six springs for precise boost adjustments. The swivel-type nipple offers greater flexibility in hose routing, and up to three springs can be combined to achieve the perfect setup.
Vehicle Fitment:
2008-2015 Mitsubishi Lancer Evolution X
(4B11/ CZ4A)
| Compressor Wheel: | Turbine Wheel: | ||
| ⒶIND(mm) | 61.4 | ⒸEXD(mm) | 58.8 |
| ⒷEXD(mm) | 82 | ⒹIND(mm) | 67.0 |
| Trim | 56 | Trim | 77 |
| Blades | 6/6 | Blades | 9 |
| Material | A2618 | Material | K418 |
| Production | CNC Billet | Production | Cast |
| Compressor Housing: | Turbine Housing: | ||
| IND(mm) | 62.4 | IND(mm) | 4B11 |
| EXD(mm) | 40.2 | IND(mm) | 4B11 |
| A/R | 0.51 | A/R | 0.89 |
More Info:
CNC BILLET COMPRESSOR WHEEL
A significant improvement over traditional cast compressor wheels, these lightweight and highly durable compressor wheels are machined from aerospace-grade materials. They feature thinner blades with a larger surface area for greatly enhanced airflow and turbo spool.
MULTI RATE BILLET ACTUATOR
The large-capacity, reinforced forged billet construction includes six springs for precise boost adjustments. The swivel-type nipple offers greater flexibility when routing hoses. You can combine up to three springs to achieve the perfect setup. (Six springs included) 
![]() |
WARNING: Cancer and Reproductive Harm www.p65warnings.ca.gov |

