I have that kit ordered, so I'll report as soon as it comes in. I don't thing it will be a direct replacement, I think our rear end is different. I thought it might be good for ideas on how to modify our rear cover to adapt the cooler.
The other problem is that our rear cover is not available separately; only the whole diff, so I won't have both parts in hand to compare.
2015 SS, White, M6, Solid Roof, Spare, 11/10/14 TPW, Arrived 2/26/15