I was thinking of getting this android kit for appradio mode for my nexus 5. But Nexus 5 isnt comptabible with MHL. Anyone think it would work if i replaced the MHL adapter with the Slim Port and still use the rest of the kit.

Honestly you don't need the kit at all. Plug the slimport into HDMI port and plug a USB cable into the port on back of headunit. I used this style.

I haven't figured out how to make the nexus show full screen though - it shows with bars at the top and bottom.