old feed and return lines size and fittings

[msp03rbuld]

hey guys i bought a turbo off someone its a gt25/28 hybrid garrett. i was wondering what would be the best size fittings and line to run to the feed and return.

 

[KrayzieFox]

Before you install this, make sure it's actually better than the stock turbo. Is it dual ball bearing? Water cooled?

And are you talking about the oil feed/return?