If you're already rooted - XZDualRecovery
If you don't have root, then it's a little more complicated, as there is no method to root 4.3 directly without unlocking the bootloader.
You have a few choices -
1. Unlock bootloader to root.
2. Downgrade to 4.2.2, root and flash a prerooted rom.
3. Wait for an exploit to be found to root 4.3.
All this information is readily available around the Z section, so please search in future.
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