Wife was hit in the back while driving our 07 ZX5. Nothing major, mostly cosmetic and a little bent metal. Exhaust was ripped down and while rehanging it today I noticed it’s in pretty rough shape with a couple baling wire repairs from rusted hangers. I’d like to get rid of it all and replace with stainless but don’t want it to be loud or drone. I’d like to just get a factory replacement system made from stainless but haven’t found any yet. If performance systems are my only option, who has the quietest and do they need a tune?