Quoting curtis:
Ok details on these saab 9000 brakes front and rear
Spoke with a Swedish friend of mine on the phone last night who builds a lot of rally car stuff up in Seattle. Without hearing specifically from Ross, we suspect that the Saab rotors are thicker, beefier, while still fitting behind 15" wheels. (15" wheels present the most options for tire selection, so stepping up to a big brake kit screws you on wheel/tire selection for rally.)
I believe the bolt pattern is off, so drilling is likely required, but it's something I intend to look into for my Galant.