Bumper lip?
 

I know greddy makes a front lip, but do they make a rear bumber lip? Who does make one? I am trying to stay away from fiberglass though. Can anybody help me?

They don't make a rear.

C-West and Carisma have a two piece rear lip, and there's also the JDM, OEM, Kaminari, Ro_JA, APC (stay away from them:D), Razzi and Vizage and mayb one or two more make rear lips for the RSX. I'm 99% sure te RO_JA is polyurethane and I know for sure the OEM and JDM aren't fiberglass. Not sure about the rest.

http://thersxsite.com/body.html is a list of all 02-04 RSX body kits.

im also looking for a front bumber lip but carbon fiber for my 05 si.. any one know of good brands at a good price??

Try http://www.carbon-creations.com/index2.asp and http://www.fiberimages.com/ I don't really follow the EP but I know these companies make good products overall.