what is the maximum power for using a 38mm tial wastegate, because i am planning on running a GT35 with this wastegate!
greats

u can do 900hp if u want! some people say that smaller waste gates hold high boost better but yea 38mm is perfect.

Depends on...

Where the WG is located?
DTA or recirc?
Whose, Tial, Turbonetics or other?

Generally 38mm "should" be good for +/- 400HP

the wastegate is located on the flange of the full race ramhorn mani
it is going to be an open dumptube
its a tial

i hope i can go with it because i already have it

^ actually the 38mm if you ask tial is good to like 550-600. if placed properly.