I plan on upgrading my battery and alt, but it would be a little bit after getting my subs and amp. and i have 3 A pillars in my car (i think), its a 2006 4dr toyota corolla. i would also need help figuring out how to wire stuff at 1ohm and all that, i have no clue what any of you are talking about when it comes to wiring things at Ohms, sorry for being such a noob with everyone haha