02.5 and up wrx's have a anti clutch drop dealio on them . The 5 speed in the 2002 - early 2003 WRX's is a POS. After that they increased the gear size by 1 or 2mm I can't remeber.
The 5 speed like any transmission does not take kindly to ABUSE. The sti six speed on the other hand was forged by the hand of god. lol