Hello guys. I'm thinking about putting HID lights on my girlfriends mazda 6 and was looking for some tips before I order them and start this project.

I have watched some videos and some say I must remove the front bumper and some say I can get to them from behind the front wheel well to get to the bulbs. Which method would be easiest for this project and where would be a good place to hide the ballasts, since the engine bay is kind of crowded?