Yes, but leave the original on as well.

The kicker kit doesn't say anything about the wire or it's quality. I used Knu for mine and attribute that to a lot of the lack of issues that I have. I have zero dimming etc. But then we have different setups. Take a look at this basic Knu kit. 4 Gauge Amplifier Installation Kit Tells you what the wire consists of. How it's connected etc.