Peterbilt Cummins ISX, Engine
| Engine capacity | 15,000 cm³ |
| Maximum power (range), hp | 400 |
| Maximum torque, N*m (kg*m) at rpm. | 1,600 (163) / 1400 |
| Fuel used | Diesel fuel |
| Engine type | In-line, 6-cylinder |
| Maximum power, hp (kW) at rpm | 400 (294) / 2100 |
| Supercharger | Turbine |
| Number of valves per cylinder (range) | 4 |