Replacing the cat+the downpipe all with each other isn’t a bad concept. Nevertheless, most cats aren’t extremely restrictive in recent times…Until you’re rising the Enhance level, I’d say that the OEM cat is fine. Corvette E-Ray is yet another stage ahead within the very long heritage of Corvette firsts. See https://danteagnuz.wikipowell.com/5695737/5_essential_elements_for_audi