electrical upgrade

I am trying to run 4k RMS to 2 12s out of an 8kW amp in a 2006-11 civic si (the 2.0L) the amps of the oem alt is around 105-110, i know im going to need electrical upgrades. Can anyone help me/ tell me how to figure out the power my alternator puts out. I assume I will probably need an extra...

I am looking for an alternator that will easily charge up my batteries. I have 2 XS Power D3400 XS Series 12V 3,300 Amp batteries. I am running at max of 4600 watts out of my current system. Not sure how many amps I need for an alternator. I have a 2007 Ford Focus 2.0l Duratec engine.

Hey all, I was just wondering if I have all my i's dotted and my t's crossed for my electrical upgrade. I drew up a picture up in MS Paint to give you guys a better look at it. The only things I'm not sure of is the engine block to chassis and the "Batt 1 to Batt 2 - 4 Gauge wire". Are they...

Hey all, I just wanted to check with you guys on here if my to-be electrical setup will actually work and work well. This is my current setup: HU: Pioneer DEH-X9600BHS; Doors: Kicker 6x8 40CS684 rms 75 peak 225 (x4); subs: Pioneer TS-W3003D4 rms 600 peak 2,000 (x2); sub amp: Hifonics Colussus...