Hey guys. Plan on installing 4 infinity kappas along with a kicker zx 350.4 next week sometime. I plan on adding some subs later on along with another amp. Im gonna buy a single amp wiring kit for now. Question is, when i get the subs would i need to install a completely different dual amp install kit or is there a company that makes an amp add on kit. Will be installing in my ram 2500 diesel (has two batteries if it makes any difference).