I have a quicksilver on my car and don’t affect warranty Not sure with resale as only good if someone wants it Just keep the original and sell the quick silver when the time comes
Obviously opinions will vary, but as I shop for mine an aftermarket exhaust throws an instant flag for me and makes me wonder what else has been done to the car. I would never pay more $ for someone's mods. I agree, if you change it keep the original parts.
Check on ebay, often see the occasional Quicksilver exhaust for sale, no need to buy new if you can find one, then come resale you might not lose much at all.