I just had magnaflow res and mufflers installed on my svt today. I;m not positive on this but i believe you can use the same res I bought just get it in a 2" inlets for a non svt v6. I'm sure someone will chime in and correct me if I'm wrong here. Link below to a bigexhaust I think you would need the middle one part# 10424. Like I said I'm not positive if that's the one for a '97 sport but I'm fairly sure it is.
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BTW The sound on the magnaflows is great I love it.

Formerly known as Sneaku I MISS MY BABY!!! '00 Blk CSVT #1087/2150 built 12/23/99