Lots of FAQ's and threads to read but without signing in to Subi forums search's are limited to google:

Knowing the 2002 (US version) is the weakest in the WRX lineup, how much better is the 2003 as far as running changes? I found some technobobble before on running changes but never found a thread covering actual failures 2002 vs 2003 in real world beating. Have no dreams of high HP just looking at bugeyes as a driver (not afraid of rebuilding/upgrading gearsets but gears cost more than I usualy spend on a complete car!).