Is it for a Legacy engine or Impreza? The combinations of turbos etc are ALOT different.
This might be what caused the knocking mate.
Kristan my advice mate, get Knocklink AND Lamdalink fitted before the chip. Resist mate! Just to be on the safe side.
Oil pressure and oil temp are last on the list.
Defis mate Got some sitting on my desk here smiling at me! LOL!