Living in Wyoming we do not have "MOTs" or emission tests. My D2 is used mainly in the mountains as hunting/camping truck. It would be good to get rid of the o2 and the Catalytic converters - (Cats in the hills have caused forest fires here!). Basically all the dongle is a resistor to tell the ECU what it wants to hear. If I know what the voltage is that the Landrover ECU expects for the correct mixture they would be easy enough to fabricate.

My 2013 KTM Adventure bike is fitted with aftermarket Dongles in place of the o2s and the California emissions. $20 each and I lose a bunch of tubing and weight. The Bike runs way better like this and better MPG.