Street or race? I ran some really stiff front springs for a little while and liked it a lot. I was thinking of upping the front sway to a 1" to try to get some of that back w/ my 380lb springs. I don't see the need for a rear bar on my car yet. Even with ~700lb ft springs it didn't push much on the street. That was with all rubber mounts. I don't know as much as I let on. TOHCan is the sway guru AFAIK.