Introducing The Bagger Nation Cult Forty-Five Performance Pipe. The team has taken their favorite aspects from years of custom and production exhaust system know how and combined them to create the perfect pipe. First, a swedged 4" pipe body provides a seamless flow from header to pipe body. Second, Paul designed a selection of 4.5 inch, CNC machined, dialable billet end caps that not only provide a thunderous, deep exhaust note, they also create a perfect cosmetic balance in both size and shape to complement the rear end of your H-D Touring model. We then focused on the performance aspect of our new pipes. By fitting these pipes with a massive 2.5" glass pack insulated core, we created an incredible tone and terrific horsepower and torque gains throughout the RPM range.