I wanted to transform my still new 2016 Softail Slim S into a beast. I already have D & D Fatcat 2 into 1 pipes on a Streetglide Special with a 120ST motor so I knew that D & D is the sound and performance I liked. So I did some research on the Boarzilla pipes and decided they would work best for my Softail. The bike sounds like a dragon breathing fire when the throttle opens up! Hope this describes it makes sense. I love the pipes you guys make.