Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
It was worth it for me because I was experiencing rear wheel wobble during hard cornering, but if you are not having any issues with your handling then I would skip it - some dynas have problems some report no issues.
I invested in suspension upgrades early have never experienced wobble.
Good nitrogen rear shocks and heavy duty front springs along with the added iniminators have given the bike a controlled feel.
For me I don't need the true track.