2nd gen twin kit on 3rd gen cummins

[Nickels23]

Hello every one I have a set of twins that have about 2000 miles on them just sitting on self the small charger is a s357 and the large is a s475. It is Industrails kit that mounts the charger in front by rad. What kind of power do you think I could be getting out of them. And has any one used that kit on 3rd gen. Thanks