you won't find an aem cam gear for the 6g72 because simply. they don't make them. tehy are pretty much useless on the stock cam.
now if you have an aftermarket cam, like the ones RPW make then you can benefit from the aftermarket cam. more than likely you'll use it to help zero in your timing.
there were a few companies that made it but they are becmoing harder to find since most people don't buy them because its useless to most.
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