Keep in mind that certain options come with shorter shocks in the rear. For example, if you have the air springs in the back, the vehicle has shorter rear shocks and the rear shock mount is essentially a plate. Here is the upper mount, which is ~3 inched taller:



It's kind of confusing when searching for the right part number(s). I know air suspension uses the low upper rear mounts. It's easy to check, so I recommend all do that before buying after market shocks. I'm not sure what "3rd seat only" uses - might depend on sport or non-sport options. I suspect "3rd seat" and "air suspension" use the low.

To lower the vehicle with air suspension you will need the need the rear tall mounts if you want to use the B8's, but it's unclear if the air spring "spring constant" will be ok at the lower pressure to enable the lower ride height and one would probably need to re-calibrate the air spring ride height sensors. You can buy spring kits / perches to replace the air springs.