For those of you who want to return your Nexus 7 back to stock ROM, here’s stock firmware with root you can easily flash using custom recovery such as CWM or TWRP.
These are nearly 100% official as they are 100% stock firmware but with root and busybox added.
To install these, simply install them like you would install a new custom ROM. If coming from previous version of stock ROM, you do not need to do a data wipe/factory wipe but do make a backup ROM just in case.
Download Latest rooted stock ROM for your Nexus 7:
Latest Nexus 7 Android 4.3 JWR66Y ROM with root (This for original Nexus 7)
Latest New Nexus 7 Android 4.3 JSS15Q ROM with root (This for Nexus 7 2013 model)Need Help? Best way to contact me is on Twitter!
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Nexus 7 Reference
You will need a rooted Nexus 7 to install all ROM/kernels.
First time to rooting and custom ROMs? Please see our Nexus 7 Root FAQ FIRST!