I have a '03 Optima with the 2.4 Hyundai motor. I recently replaced the head. I bought the part from Autozone. That was a small fiasco. On the exhaust cam is where the blade for the cam position sensor goes. I did not remove this from the old one, as the guy from Autozone said the new one should have it. This is the same guy that rounded one of the cam gear bolts using an 18mm socket on a 17 mm bolt. Anyway, I called a Kia dealership and the parts guy said it was build onto the cam. I remember that part, and it wasn't build in. There is a threaded hole in the cam and room for it. Any idea where I can find this particular part?