I was looking to only run the supertrapp by itself. I too do not like a loud exhaust, but thought the 5" x 17-1/2" with the discs would reduce noise to a respectable level, with a distinctive exhaust note. The muffler isn't available until the 10th of next month, so I have a bit of time to make a decision. I just purchased my ride which is presently supercharged single exhaust with a rotted out muffler. Am I kidding myself that noise levels will be within acceptable street levels? i don't want to get pulled over for noise violations. Why is it that cars, trucks and dirtbikes live by one standard, and Harley's have their own standard?