Well I'm trying to make my old rev 2 SW20* wheel fit my 1995 ST205 (GT4) as my rev 2 wheel is allot nicer looking but the 2 wheels are different fit. Not sure about the splines (never got that far but they look OK) BUT the horn connection and the auto-delete on the indicators is different . Sure I've seen similar wheels on GT4's and GT's so I'm just guessig it's the same. *rev 2+ steering wheels without bags should be the same fit through the revs