That kit that I am running from walmart is actually 4AWG they actually have really decent wire in that kit because of the power cap. I have been running this kit now for a number of years and in multiple setups up to running 2 1000W mono class D amps and a 500W 4ch all on the same 4 Gauge wire with a distribution block. The only thing that I recomend for this kit is get better terminals for the wire than what come in the kit ( they are the cheap china crap ) I picked up comercial lugs at lowes and they work flawless. The only bad thing is they may be numberd at walmart until they run out because I canot find it online anymore, but my local store has 2 left ( I swear walmart is getting rid of all the good stuff and just stocking crap now a days)