I only say that b/c I've seen sets come up for sale locally for under $100. I definitely keeping my eyes out for some quality slipons. I'd love to split the difference between the quiet stock pipes and the loud VnH straighshots.

 

The baffles in with the 1 5/8 TTIs sounded a little wimpy to me. I ordered a set of 2 5/8 TTIs and a slide hammer to pull the Rush baffles out. The bars across the baffle promptly broke off since they were barely spot welded so I had a 2 day argument and a lot of drilling and pounding to get them out.
Installed the big TTIs straight across at first. Ran it down to put gas in for winter and it sounded weird. A clattering sound more than the cool thumps I was looking for. Frigid weather set in so I had time to reset the angles of the TTIs. With Rush slip ons they all but filled the pipe with a very small gap around them. They were acting almost like potatoes crammed in there. I angled them about 15 degrees to have a nice gap around one side. Today was a WARM 56 outside. I took it for a test ride and DAMN. They sound gorgeous, just what I wanted. Not real loud, either. In traffic on a 25 mph residential street in 2nd, I barely blipped the gas and the front end almost came up. Had I given it a quick half throttle, it would have. I've been jealous of the sound other Sporties make, but not any more.
If you have 3" mufflers, pull the baffles, mount the 2 5/8 TTIs and make sure the exhaust can escape. You won't be shopping for exhausts any more. WE have arrived, boys. Thanks go out to DK products. A very cool company.
EDIT: I don't have a decent camera but Mr Robb did. Here's his 2013 72 with gutted SE slipons (3") with 2 5/8 TTIs.
Give it a listen as he splits lanes across town. He passed away (RIP) but he got my attention with that red 72. His bike sounds like mine, now.

 

I’m not too familiar with the solid mount bikes. I’d think it’d be easy enough to add the O2 bungs to a solid mount pipe.