Gearbox Oil Cooler Pipe Set 300Tdi Auto Land Rover Discovery/RR. Classic (DLS280). Gearbox Oil Cooler Pipe Set. Oil Cooler Pipe Lower 200Tdi Land Rover Discovery 1 VIN KA034314 on (ESR1258). Oil Cooler Pipe Upper 200Tdi Land Rover Discovery 1 VIN KA034314 on (ESR1257).