Adjustable Audi AAN cam gear with shutter wheel
1) gear does not ship with an outer TDC mark. It is up to the customer to scribe your desired TDC mark on the outer ring. Lay it up against your factory gear to accomplish this on stock setup.
2) ALL adjustment allen bolts must be installed with thread locker. They WILL loosen up over time without proper application of loctite!
3) check clearance against the cam position sensor mounting bolts on AAN applications. in some cases light clearancing is necessary for the 'shutter' wheel to clear the bolts.