Requirements:
1. Root (Super Su)
3. Busybox
2. Flashfire

Step 1: Download the file here-> https://drive.google.com/open?id=0B0YTHvJcV5rzRzNsTDV4MlViSUk
Step 2: Copy to root of your device storage
Step 3: Open Flashfire and Select Flash Zip or OTA
Step 4: Now Select ViperFx zip file
Step 5: After that click on the Flash button
Step 6: Have some coffee while flashfire loads and flashes your viperfx zip file.
Step 7: After reboot open viperx and it will ask you for installing driver click yes
Step 8: Reboot and Done