Beef up your rear end!
The subframe is a brand new factory unit that's been modified to take a G8 GXP rear diff (GM part 92223667). It's reinforced considerably to take the loads and the differential mount has been designed to allow you to easily remove the diff and even inspect the bushings with the diff in place. You can fit a 2010-15 Camaro AAM differential with a bit of modification.
The driveshaft is intended to be used with a G8 diff (or other diff that uses the same flange) and a F-body T56 transmission. It's aluminum for light weight.
The halfshafts are compatible with stock ND hubs. The price is for a pair.