Petrol Turbo Tuning Box - CRTD4 - RC200t, NX200t, IS200t, RX200t, GS200tPetrol Turbo Digital Tuning Box Multi Channel Our multi channel tuning boxes connect simply & securely to your engine's wiring loom and work in parallel with your Engine Control Unit (ECU). Our products adjust and streamline the engine's fuel injection parameters and turbo boost control to significantly improve overall performance. Tuning boxes come with a vehicle specific wiring loom which plugs straight into the cars existing loom, there is no wire