I just swapped out the 2:1 (cat) exhaust/Nightstick to an '09 (non-cat) exhaust 2:1:2 and Fatshotz on my 2010 Streetglide. The openend caps are too loud for my taste. I'm installing closed end caps next. I want to replicate the Nightstick sound as much as possible. If the closed caps w/ 12 discs don't change it enough, will a core change to the solid tube get that Nightstick sound? And a related question: what is the quietest combination with the Fatshotz slip-ons?
Many thanks!