I had a 25de Neo in my old 33 and I turbod it on my green p's. All I did was source out all the stock parts so, side mount inter cooler, stock 25 turbo, as much of the stock piping as I could get and that was it. I already had the det ecu but you will need that aswell. In total I think everything cost me $300 but I also paid a mechanic friend to install it because I didn't want the hassle of tapping holes for the oil lines etc