Soundqubed Big 3 upgrade is intended to help you vehicles voltage stay as powerful as it can be. With a 1/0 big 3 wiring kit, you get a 4' foot in length Green Positive wire that includes a crimped terminal already.This wire is then installed and cut to length, and crimped with a provided terminal and secured with protective, branded, heat shrink. These steps are then repeated for the ground cables. We recommend upgrading the ground wire from teh battery to the frame of the vehicle and the frame of the vehicle to the engine. We DO NOT recommend removing the factory wire of the vehicle. Rather, adding this wire over the top of the factory wire. Electricty will choose the path of least resistance which will allow the vehicle to hold its factory OEM voltage better than if the facotry wiring was the only thing there.