I just saw this and don't know if anyone else has...

But I guess there's a replacement for the front cat on our CA spec vq30 engines...

http://cgi.ebay.com/ebaymotors/99-20...QQcmdZViewItem

And also just found, the rear cat or aftermarket factory style y-pipe

http://cgi.ebay.com/ebaymotors/Nissa...QQcmdZViewItem

and

http://cgi.ebay.com/ebaymotors/Nissa...QQcmdZViewItem

and fed spec y pipe with converters

http://cgi.ebay.com/ebaymotors/95-00...QQcmdZViewItem

yup.. just had mine replaced under warranty for free.... 8/80 emissions