Td04 will Max out at 280 at about 1.4 bar ish
350 is near max for the gearbox really , Wrx gesrbox will let go before engine normally
Depends on mapper and what system they are using
I would just bin the td04 for starters mate , stick a 05 on and run at less boost
More boost = more pressure so therefore failure on components
350+ you need to start thinking rebuild