You could get the RS package in 98+, but I don't recall what years it was available. It was a V6 that all the SS ground skirts and stuff but not the SS hood.
http://en.wikipedia.org/wiki/Chevrolet_Camaro_%28fourth_generation%29
I think it was available on earlier years too but I'm not 100% certain. I thought I saw a '99 RS around once but forget.