That's what I did, installed factory fog lamp units into my S, got the replacement turn signal stalk and then swapped out the bulbs. I got 100w white bulbs, but for whatever reason, they didn't fit the light harness the way the factory bulbs did (they had an internal tab mounted opposite the factory so they were backwards). I had to shave off the internal tab then install the bulbs, but they are standard H11's and work pretty good. I also put replacement bulbs into my headlights and then got the silverstar silver replacement turn signal bulbs, makes the front end look a little different and the light is much whiter than standard halogen bulbs.