909-Twins Slip-On (Chromem) Flsb 18-24909 Twins Slip On MufflerFeatures a unique scalloped and smooth rolled outer tip that is matched with a scalloped inner tip This "Twin" tip design gives an elegant look, especially because there are no visible outer screws securing the core Uses a 2. 25 inch perforated core for its traditional and recognizable Harley sound Your existing muffler inlet gasket cannot be reused. A new gasket must be purchased separately for this installation, such as part