As said above the turbo ,gt3 and gt2 use the gt1 based dry sump engine, the normal engines seem to fail more often and the RMS seal goes on them.
Ive had my turbo for nearly a year now and in that time ive had to replace the two outer rads(£400) and top up the oil , im getting an average of around 18mpg.

On a side note James can msd mod the maps in these or is it just a generic map that use have. I have stuff to datalog afr,maf,timing...