The Super Dexta with Roadless 4wd has revised injection pump with mechanical governing, the drain slots in the top of the transfer gearbox, otherwise full spec. like our other 4wd Dextas. Sporting the shorter steering-box arms for easier effort at the steering wheel, all 5 of our kits are supplied with these optional parts to match the thicker draglinks of these tractors over their 2wd counterparts.