Either Hard S from a 99-00, or the regular suspension from 99+. After the Hard S in 99\00 it became standard.

Ready to bolt in, or just the springs and shocks. Let me know what you have, how much you want, and how many miles on the parts.

 

Bilsteins with stiffer springs didn't become standard ever to my knowledge.

 

Did you find some? I've got a spare Hard-S set in my shed. Forgot if it's got tophats or not. I think it's the complete dropouts.

Frank