Fits Dyna/FX Models 2006-2017
Engineered to handle today higher displacement motors.
Upstarts feature 1-3/4 inch head pipes stepped up to 2-1/2 inch Quadradical Up-Slash Muffler Bodies.
Internally, Stainless Steel, Perforated Core Baffles wrapped in Dual Density Packing complete the system
Full Coverage 2-1/4 Head Pipe shields. 18mm O2 Ports with 12mm Inserts.