Replacing the cat+the downpipe all together isn’t a nasty notion. On the other hand, most cats aren’t very restrictive these days…Until you’re expanding the Enhance amount, I’d say which the OEM cat is ok. Patrick – You’ll see some more ability this way, but I’d counsel considering on the list https://jaredtckq40741.blogunteer.com/29008116/downpipe-rs6-c8-a-comprehensive-guide