The 9006 bulbs are a perfect fit, no modification necessary. I swapped in some 9006 Silver Star ZXEs last night, love them! They are very close in color to the white LED DRL's and the light output is MUCH better as well. Sorry for the lousy pic, iPhone cameras don't do well in the dark (and rain). Hopefully you can get somewhat of an idea of the contrast between the lows and the OEM fogs though. You really have to see it in person to fully appreciate it, I’ll try to take some better pics when the weather clears up. I bought my bulbs off ebay brand new for $35 but you can get them for about $60 locally. This is a great alternative for those of us who don’t want to go through the hassle/expense of an HID conversion.