Some one was nice enough to release the ZV5 TOT file for the LG LS991. This file can be used to flash your device back to stock. You may need this file for prepping a phone for sale, or if you flash an incorrect file in custom recovery. If you are already familiar with flashing a TOT file to an LG device the process is the same its just that files have changed. Grab the files needed along with full flashing instructions at the link below.
via XDA