[Jake Raby]

Forget about the size of the sprocket, whoever wrote that has never assembled one of these engines. Typical.

You have a duplex style IMS drive, early, pre mid 2000. Also, it looks like your bank 2 IMS sprocket has slipped on the shaft.

Now, do NOT buy the IWIS brand chain, these are fitting the IMS drive too tightly and thousands of them are in circulation as bad parts. The distributors now know about this, and have since we discovered it over the summer, but nothing can be done about all the bad ones already out there, or those sold by people that don't build engines.

The IWIS brand chains are by far superior for the rest of the engine, but in this case they are too narrow to fit properly. Only use the RENOLD chain, which isn't as great of quality, but does fit properly.