While Google has abandoned the Galaxy Nexus with Android 4.4 KitKat, that never stops the resilient devs over at XDA. A dev team by the name of “SlimRoms” has built KitKat straight from source and made it available for most variants of the Galaxy Nexus, and all was left was the Sprint Galaxy Nexus (toroplus). If you wish to flash this, you will need your bootloader to be unlocked and have a custom recovery installed. Considering this is still in alpha stages, so bugs may be prevalent.
Head over to the source link for the XDA thread and for download links.