Okay the good part first. It does include all necessary parts to install a car amplifier. The bad, it's not 4 gauge wiring. It's the correct diameter but 50% of this is the surrounding protective cover. I would suggest this kit to somebody that is installing an amp 500 watts or less. If you're looking for big bandwidth wire, this is not the kit for you. The price and suggestion at it being 4 gauge is very alluring but be weary, it's not what you're expecting.