Yes, they will fit. There is a slight gap from where the outside of the turn signal housing fits the bumper. I don't have any close up pics of it. The 99 signals come to a point on the side by the tire well (by the amber part of the light), where the stock ones round out. Yea, I think thats why. If you want it to be flush with the bumper you'd have to do the 99 bumper upgrade. Here is one pic of mine.
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