T25 turbo oil in/out thread size?

Can anyone tell me what the thread size are on a Garrett T25 for the oil in / out.

I am going through the process of redoing the oil drain arrangement that was previously very poor.

The fill and drains holes / threads look like the same size.

I have the banjo fitting to -4 for the oil in but I need to redo the drain from the turbo and into the sump.

Thanks,
Damian

don't know the size but i was told that you should always use a larger line for the return so that there is no pressure buildup.

I'm sure someone else can confirm

Thats right. Run a larger return.