Yep, I wondered that, Clifton. I used an FP3 on my Street Glide and it worked very well. Toying with the idea of buying another for my 2020 Street Bob. I’ve put V&H 3” rounds on it. V&H have said if that’s the only change I can “get away with” not having a tune. It runs just as well as it ever did, but sounds so much better