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Aus Spec WRX rack: part # 34110FE130 (16:1)
Aus spec STi rack: part # 34110 FE510 (15:1)
JDM Spec C rack: part # 34110FE440 (13:1)
The mounting method changes for '05 but the ratios are the same.
http://forums.nasioc.com/forums/show...=812335&page=6