I have a 2011 Chrysler 200s 3.6l My cars stock alt is 160amp so not to bad for stock. I recently bought a Zv4 12 rev2 and a hifonics brx2400. I have 1 run of sky high ofc 1/0g to the rear so far. I want to get a d3100 for the rear but can I mix the d3100 with my stock battery?? If I do that will the life of both battery's decrease??? Also do I need a H.O alternator??? The biggest one I can find for my car is a 240amp Thanks!!