Hi all, so maybe I am just getting old but just spent the last 3 hours searching for a thread I am sure existed that talkd about this subject. I also remember someone saying that goths exhaust design was matched to the exhaust of our 355s and the other ones were not because the exhausts are not round but the pipes are. Am I dreaming, mixing up some threads or what. Can not find anything Reason I am askng is just took off my tubis that have been on for 8 years and the headers do match the shape of the exhaust ports so what have others found. Thanks for sharing.