I had a conversation with Mancini Racing and they verified they are offering the Magnum balance offset flex plates. They are having a local company modify/add the offset notch. They did not have one on hand when I spoke to them so I have not seen one in person yet. If ordering one, make sure you are very specific that is is 5.9 Magnum balance you are seeking. This is a new offering to them and the salesmen on the phones may not be fully up to speed on this yet.