It seems like there are so many devices that are receiving unofficial builds of Kit Kat. The Htc One, Sony Xperia Z, Nexus 7, and Nexus 4 have all received their own builds of Kit Kat. You can now add the T-mobile version of the Moto X to the list. The leaked build comes to us courtesy of XDA member TheOrangeRemix. The leaked rom appears to be mostly functional. You will have to be sure to do a full wipe during the update process. If you don't wipe data and calls won't work. This is only meant for the T-mobile variant and may damage any other device. You will want to be sure to backup all data on your device before proceeding. Head to the link below for the download.
Via XDA
Via XDA