This 4-inch slip-on system gives you the sound and look you would expect from a premium muffler, at an incredibly low price.


The 4-inch diameter, 909-Twins feature 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. We use a 2.25-inch perforated core for its traditional and recognizable Harley sound. These mufflers carry our limited lifetime warranty too. Incredible styling, great sound, lifetime warranty and a $399.95 price. Tough to beat.