Would a 1998 (STi Version 5 ~ 6) FSM be of any use to you.

GenMarket Impreza FSM 1998

or maybe the JDFSM site

Index of /Auto/Japan/Subaru/Impreza/1998


Note: I'm newbie when it comes to the different models of Subaru. I just like to try and help owners out if I can.

The only 2 that I have owned were a 2000 Liberty RX and 2003 XS Forester. I never did anything mechanical on these cars either, outside of my knowledge.