Oppo Find 5 has not received any official Android Kitkat update. But still you can test that by installing AOKP Kitkat ROM on this. For installation you will require a set of few files. Like the kitkat rom, oppo driver, modem firmware, google apps package, installation guide, etc. So in this download package you will get everything you want. Just click on that and download. The total size is around 358 MB. The package include the guide also on Techarena forums. Just check inside Tips and Tweaks section.