bumping this thread as there is a lot of 18'19 talk but no mention of 20's. I just got the car and havent crawled underneath to measure, but has anyone put it on a 2020 yet? Curious on what the verdict was about diameter of it, etc.
Regardless of 60 or 65mm, any decent muffler shop can install the muffler on any 18, 19, 20, or 21.