The biggest obstacle I see is the size of these. the smallest one is 9" in diameter and used on a 4.6 liter engine. Would a 9" charger even fit in the front of the 2.5? and if the smallest displacement they are working on is 4.6 we may have to spin it so slow that it wouldn't be that efficient. Also the parasitic loss on a V8 is proportionally less important than it is on a 4cylinder. So spinning this thing slowly with boost kicking in late in the rpm range could make for a really weak bottom end.
Granted this is all speculation feel free to pick it apart!