It fits! To be honest the only part of the exhaust on the Viggen from the cat back is the muffler. I had bought a slightly used Viggen exhaust and all I changed was the muffler as the other pipes looked identical to what was under my car. And yes the Viggen exhaust was installed on my '96 900 SET and now the same exhaust is on my '99 9-3. The funny thing is that the Viggen muffler was very quiet on my 900 but has a nice rumble to it on my 9-3. It should sound better when I instal my MP Performance downpipe!!
'07 9-3 SC (232 whp-265 wft/lbs)
'06 Audi A3 2.0T (260 hp-307 ft/lbs)