Here we introduce you EternityProject’s CyanogenMod 10.1 custom rom for LG Optimus 4X. It contains various optimizations made at compilation time. Moreover, it isn’t being compiled with the default Android toolchain, but with a custom one that handles and optimizes the code better.
Steps to install CM10 custom rom on LG Optimus 4X HD P880:
CyanogenMod 10 for LG Optimus 4X HD Download:
LG Optimus 4X HD Phone Photos - LG Cell Phone Pictures

Here’s the TWRP recovery for LG Optimus 4X HD, it’s a full-touch based recovery that allows some of the great operations on your device such as making nandroid backups, installing custom ROMs and so on.
All Credit to @Dexter_nlb for BootStrape/CWM recovery work
How to install Touch based TWRP Recovery on LG Optimus 4X HD:
Congrats! Your LG Optimus 4X HD is now rocking TWRP Recovery and now begins your race towards customization!
Warning & Issue:
LG Optimus 4X HD Phone Photos - LG Cell Phone Pictures

There is a touch based ClockworkMod recovery available for the LG Optimus 4X HD. It is extremely helpful as it can be controlled with touch rather than using the volume buttons to scroll through the recovery. Besides, installing custom ROMs and custom kernels, a variety of functions can be performed using the CWM recovery like clearing cache and dalvik cache, fixing permissions, factory resetting the phone, making Nandroid backup, etc.
Caution: Do this at your own risk, and do NOT try this on Android 4.1.2 Jelly Bean.
Follow the procedure given below to Install the Touch based ClockworkMod Recovery on the LG Optimus 4X HD.
LG Optimus 4X HD CWM touch recovery download:
How to install Touch based ClockworkMod Recovery on LG Optimus 4X HD:
Have fun playing with it! If you have any issues, please fire them up in the comments below!
LG Optimus 4X HD Phone Photos - LG Cell Phone Pictures
