So the 2014/2015's are bulb size 9012, hard to find.

I heard you can use 9006 HID bulbs, but won't they pop out of place? Usually ppl trim the 9012 DOWN to 9006, so the 9006 tab is smaller than 9012, so it might be loose?

Anyway, can you pop in a 9012 LED headlight into the stock housing plug-and-play style? I ask because you can find some 9012 LED headlights for the same price as 9012 HID kits, and they have much longer life without the fussiness of unreliable ballasts, buzzing noise, etc.

 

In general LEDs are not bright enough for headlights unless the fixtures were designed specifically for them (the new Corolla for example, they are part of the actual fixture). The bulbs you are looking at are probably meant for fog/driving lights, and even in that application the manufacturers will tell you they only put out enough light for cosmetic looks, not for actual driving. If you don't want to modify the 9006 kits there are a few 9012 HID kits out there, and there should be more as time goes on.