I have to replace my Intake Cam Gears and found a used set. There is a small different in mine and the ones I found for sale, though. The ones I found have what looks like 6 bolts on the back side of them where it connects to the camshaft. Mine don't have these. They look like the same exact size and are from a vq35de. Did they make different cam gears for the other nissan models or is this an updated version or something? I have an 03 track. I'm not sure what model these used ones came out of. Does anyone know if there is a difference or if I will be able to use these on my Z?