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.
I went with poly long after I went to 14" apes. Wished I had done when I first switched.....to much movement in the bars. Not any real difference in vibration.
I made the switch to Poly when I went to WG bars and 3" risers. At first, I noticed a little vibration I hadn't noticed before but that only lasted about a day and everything seemed better. Goodsolid feel and I like 'em.
Put poly risers/Dyna bars with weight in the ends on my 100hp '01 Sporty and got less vibration...put 1200S bars on my 103 FXDXT and I think I got a bit more vibe but more solid feel. Brother has the HD Fat Mini Apes and we used poly in them, too; the rubber mounts felt too loose.
I did the poly bushings, but didn't like the way it felt with the caps that came with them. So I kept the poly bushings and used the stock insert/washer to bolt them up - much better.
Helpful tip...dont spend more than $12 for a set of pooly bushings...they are all the same material...just marketing for the price. Got a set of Drag Specialties bushings from Dennis Kirk for about $11 and have 6" risers...night and day difference and I have MUCH more control of the bike into corners than before....best upgrade IMO