I'm running a D&D 2 into 1, made massive improvements in the Torque Department but damn they are loud. She has a great cracking sound between gears, others know you are coming.
Thinking of going back to my D&D slip on's since they a lot quiter. Maybe after Labor day, have a race planned with my Uncle who just installed a 124ci in his softail, just want extra added torque to give him a run for his money.
If sound is not a factor in your community, this is a great pipe, you'll need a fuel management system, going from one exhaust to another I had to add a bunch more fuel.
I think I have a pic in my profile? Haven't been in there lately to look if not I'll try and up load one?
Aloha