Download CM13 V2 From The Link Given Below

     Extract the ROM and place is sd card.

     Go To Twrp recovery and do a full wipe.

     Click on Install and at bottom right you can find option to install image click on it

     The extracted rom contains three images . Boot ,Boot2sd and System.img

     Select boot.img then twrp shows a list then select boot from it and flash.

     Dont Flash Boot2sd.img

     After step 6 select system.img and system image option from TWRP and flash.

     Thats it u have succesfully done it.

     Wait For Boot And Enjoy Your CM 13.

     NOTE : First Boot May Take Upto 5 Min So Dont be Panic.

     Source : www.atozhacks.tk

     Im using custom theme the original screenshots will differ