I need a catback for my '98 GT the dumps are annoying.. Also, I have 94-97 and 99-04 rear hanger so I'm not picky about which year. No rusted out junk.
I have an SLP IRS catback, but you don't need that anymore. If I knew what I was buying next I would sell you the Borla XR1 off my 96 but I really don't know if I am going to need it or not so I am not selling off just yet.
Irs exhaust would get beaten senseless under a sra. They make kits that look like a irs exhaust that basically come back where the tailpipes normally are and turn in behind the bumper out of site and then exit in the middle.
I've never seen a true irs exhaust and don't think it could work especially since there is so much movement up and down.