I put on a set of the Supertrapp IDS (internal disc system), slip ons last night. I was going to get the fishtail ends 'till I saw them in a photo on a bike. (Too damn long). I also didn't like the tapered cone tips that came with the mufflers, so I tried the double groove billet end caps from my screamin' eagle 2 piece slip ons, but they fit very loose.
I was wondering what to do next when I remembered that the end caps off of our stock pipes wouldn't fit the screamin' eagle mufflers. So I decided to try those. PERFECT FIT. One of the three bolt holes in the stock tip even lines up with the single retaining hole in the Supertrapp muffler. Fits real nice and snug, just like the Supertrapp tips.
So now I have the V & H true dual head pipes with Supertrapp IDS mufflers with stock FLHTCSE2 billet end caps.
An added plus is if the mufflers ever start to yellow or blue, the stock muffler heat shields will fit right on there.
I'll try to post a couple of pics when I get home.