winkychevelle 10+ year member
CarAudio.com Veteran
For a audio system upgrade leave the interstate in there and add an audio battery out back. Some thing like kinetic, xs power, oddessy, stinger, batcap, there are many more but that's off the top of my head. And again I recommend the xs d3100 best batt I've ever ownedwas looking at getting a diehard platinum battery to replace the interstate battery i have now