how hard is it to install ?
anyone here done this before ?

the back of it looks irregular so its not like those universal ones where you can just drill a hole and stick it in

 

What I would do is take a piece of cardboard and cut a hole out to fit the side marker snugly. Then I would tape off the area on the car and outline the hole in the cardboard onto the tape on the car. Then just get out your handy dandy dremel tool and grind away until they fit.

 

What do you mean "the back of it"? The grey thing looks like a harness which would hook up to the original JDM car. But i'm sure its just a +/- wire you can stick in there.

 

I think Minh means the shape is not circular.

 

that is exactly what my friend did when he put his jdm sidemarkers on his civic