I just got my aftermarket corners in an I cant figure out how to get the old ones off. As far as I can tell from looking at the new ones there is one bolt that holds them on. I can see it but I cant get to it.
you have to remove the black plastic piece thats over the fan and radiator ( not sure what its called ). you should be able to see the bolt when you do. IIRC the haedlight has to come before the corner.
I got it but you dont really have to remove the black radiator cover/whatever its called. But it makes it easier. you just undo the one nut and slowly pull it out. It has 2 snaps and one piece to guid it.