Google releases the Android 4.0.4 Factory images for the Nexus S
This are the binary image files that are provided for use in restoring your Nexus device's original factory firmware. These files are for use only on your personal Nexus devices and may not be disassembled, decompiled, reverse engineered, modified or redistributed by you or used in any way except as specifically set forth in the license terms that came with your device.
Factory Images "soju" for Nexus S (worldwide version, i9020t) Android 4.0.4 (IMM76D)
Factory Images "sojua" for Nexus S (850MHz version, i9020a) Android 4.0.4 (IMM76D)
Factory Images "sojuk" for Nexus S (Korea version, m200) Android 2.3.6 (GRK39F)