I believe Brullen, Supersprint and Remus (maybe) make cat-back exhaust systems for the V6. Or you can piece-meal your own together with piping and muffler(s) as you see fit.
I've been asking this question for about 2 years with uncharacteristically disappointing results on CLUBB5. I did a Google search instead and came up with this -
$600.00 US for a cat-back V6 stainless system (part # 1030) looks pretty fair. Yes it says VR6 but it also says 98+, so call and ask to be certain.
Hope this helps.
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