If you have an RS you need these parts listed in this link. You should really check the main 2gnt.com site for links to topics that have been discussed for years. It would save time for you and us.

http://www.2gnt.com/www/corbin/sway.html

The RS has a 16mm front swaybar and no rear bar.
The GS has a 18mm front swaybar and a 13mm rear bar.
The GS-T has a 19mm front swaybar and a 15mm rear bar.
The GSX has a 19mm front swaybar and a 18mm rear bar.

There are many sites out there that have misinformation.

It is really best to buy swaybars in pairs when upgrading. If you plan on leaving the 16mm RS front bar, then I would just get a 15mm GS-T rear bar. My car was very neutral when I had this setup. It does require better struts/higher spring rates to keep from leaning, but this is another topic.

If people would comment with good/correct information when they post, it would help others a great deal. Large/Big does not really say much when it comes to sizing. If you do not really know, then say so or do not comment.

97 RS(PTE SC-61, Built Long Block, Electromotive Tec 3)It's Here!