You might find that the T25G (Thats what that turbo is) is a bit too low-mid RPM range oriented for a 4age. Having that mid range response is great yes, but the .49 rear housing really does restrict top end flow.
For a 4AGE I think you'd be better off with a T28 or bigger (GT28R 2871R etc), then the efficiency range of the turbo will match up a lot better with the GE's revvie nature.
I'm actually 4/5 of the way through swapping my T25G out for an S14 T28 which I had on my car last year. Put it this way - I haven't touched my shift light since going EFI etc. When I'm running the T25G I would only ever see the shift light with wheel spin. There was no point revving the motor out, you just better off cracking another gear and using that mid range power again. With the T28 and the same "spirited driving" I would see the shift light every gear change as it would just keep pulling harder and harder the more you revved it. The T28 obviously had about 1000rpm extra lag though.
Just some food for though.
Si. :laff: