D23 & D40 Ultra Boost Tunable ECU 4 Maps: Factory - Power - Towing - Ai (Ai=Artificial Intelligence) Enables tuning of Boost, Injector Duration & Common Rail Pressure Mobile App controller for Android and Apple Dash mounted controller to change Maps on the go Up to 50% more Torque with standard Turbo and no modifications Up to 2 litres /100kms of diesel fuel saving assuming the same driving style Often can carry 1 gear higher on hills Built in Digital Dash Built in Boost Gauge Built in Rail Pressure Gauge Full GPS data available in the App Personalised and customisable home screen in the App Injector duration tune tweaking available for advanced users via the mobile ap