PS3 CFW 4.83 FERROX (w/ COBRA v7.55) by Alexander - YouTube
List of PS3 CFW's 4.83 | ConsoleCrunch Official Site
PS3 News: multiMAN 4.85 released coming with support for CFW 4.83 to 4.85 - First update to this highly popular backup manager since the release of FW 4.82! - Wololo.net
PS3 - 4.83 FERROX (w/ COBRA v7.55) CFW by Alexander | PSX-Place
PS3 - [Update] multiMAN 04.85.01 - Official Update from deank adds 4.83-4.85 CFW Support + PS3HEN Support | PSX-Place