Coaxial wrote on 04/07/13 at 15:37:29:To be honest I couldn't tell you. I never tried it. Didn't even know it was available. To me it just looks like a restricter to reduce the diameter of either the inlet or outlet of the muffler, it might help but I dought it will help much, since the Jardine is basically an open pipe type muffler. Think glass packs that you would put on a cage, and that is kinda what the Jardine is. It will still act as basically an open pipe which is the hardest to jet for.
As for getting a Dyna you might try ebay, which is what I'm fixing todo since I'm having issues finding one locally myself.
R.F.