Subaru Legacy Outback 1999 2.5, same as year 2002?

The 2002 would be SOHC. The 99 may be DOHC but it is easy to look and confirm this.

There's a small possibility that a late 1999 OB would have the newer SOHC motor...which would be a good thing, as, under no circumstances should these flawed first DOHC pigs ever be invested further in.