What are the tuning options?
A Stage 1 tuning file will give a reliable increase and is suitable for a car without modifications.
A Stage 2 tuning file is suitable for a car with hardware modifications. Usually this consists of an upgraded exhaust, intercooler, intake system.
Many diesel cars are now fitted with a Diesel Particulate Filter (DPF). The DPF can be disabled by deactivating the functionality in the ECU and removing it from the exhaust system.
Many diesel cars are fitted with Exhaust Gas Recirculation (EGR) valves and a prone to failure. The EGR can be deactivated by disabling the functionality in the ECU.