Well finally got this done, thanks for your help Shawn. I had to go with a Supertrapp end cap, the HMF turndown was too wide for my DG. I had to put the spark arrestor on the back, I know you mentioned it was supposed to be forward, but it wasn't working with the type of endcap I had. Also wrapped the header with ceramic heat wrap, painted the wrap with hi heat silicone paint and installed a universal heat guard. It's "slightly" quieter, but oh well, I haven't messed with it much since installing. Few pics!