That's a water/oil cooler which alot of factory cars have( even my old rs turbo which was 1987 registered) it uses the engines coolant to do the cooling. If you replace with aftermarket you normally remove that sandwich plate, join the two water pipes together and get a differant sandwich plate which allows oil out those two pipes on the side and then you route pipes to a nice new oil/air cooler. At least that's what I've done in the past, I don't know if the Zed is differant