I have bought 2 arms one from hog pro in CA and one direct from JMC. The cost is about $800.00. I am sure it is much stiffer but I did not notice any differance. It looks great. I have a 180 on mine but I needed to go with a chain to clear the tire.
Thanks, You can order the arm with the chain guard mounts. Most all the harley arms they make don't come with a brace because the belt won't clear it. I wanted the brace just for the visual impact. The brace makes the arm stiffer but I don't think you would notice it on a dyna frame. WWW.Hogpro.com used to keep JMC arms In stock. Give them a try.