I haven't come across any 2.5T lowered on 28701-2.
You might also do a search on
G70 forums for reference. Note that any spring kit designed for the Stinger/
G70 platform will have the rear ride height lower on a Stinger than on a
G70, because of the extra weight and longer wheelbase. That was definitely our experiences on ours. Eibach does publish estimated ride height for the various Stinger models (
3.3T, 2.0T, RWD, AWD, etc.), Even though H&R's spring rates and free lengths will be a bit different compared to those of Eibach, you can use Eibach's numbers as a reference when you compare what you have now with 28701-1, vs. what it might be with the 28701-2.