TWRP recovery is now available for the Nexus 7 2013. Of course you need to have an unlocked bootloader on your Nexus 7 2013. Installation is pretty easy. In case you do not know how to unlock the bootloader on your Nexus 7 2013 click here.
1) Install GooManager from the Play Store or Direct Download it and install the apk
2) Open GooManager and provide root permissions
3) Hit Menu (or the button with the 3 dots on your screen) and then Install OpenRecovery
Source:-xda