rewireing my car question

[JoiNt- 10+ year member]

i have a rockford p1000.1bd amp, stock alt i believe 80 amp ill check in the morning, and wired with cheap 4 gauge wire (which is prolly 8 gauge)

i can get 35 feet of true 4 gauge knukonceptz power/ground wire for 45 bucks, enough to rewire pretty much my whole car, alternator to battery, battery to amp, and even add a 2nd battery in my car all grounded also, heres the question....the amp pushes im guessin 1100-1200 watts rms cuz its rockford so will rewireing all this and adding another battery make a noticable difference or is it not really worth it?

my car doesnt have an alternator wire upgrade atm thats also stock

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[goingdef 10+ year member]

just do the big three get a decent 4g kit and a deepcycle agm battery there's no need for a second battery and H.O. alt for that kind of power.