Make sure the world knows you're riding a Harley. These 4" slip-on mufflers from Rinehart Racing deliver - this isn't no moped sound and great looks to boot. These mufflers were designed for Harley-Davidson Touring motorcycles using the same race-proven baffle design as Rinehart Racing's True Dual Systems, meaning they're precision-machined in America to work with OE head pipes or match perfectly with their Slimline Dual Headers. If you're installing on catalyst-equipped OE pipes, there's no tuning needed or required. You can also mix and match your style, as these 4" slip-ons are available in chrome or black with matching or contrasting end caps. Your bike, your choice. Get the deep, rich sound Rinehart Racing has perfected for Harley-Davidson Touring bikes 4" slip-on mufflers are constructed using celebrated Rinehart Racing tech to increase horsepower and work perfectly with OE head pipes or Slimline Dual Headers (do not fit Rinehart Racing Stepped Headers) When installing on catalyst-equipped OE pipes, tuning is not required or recommended Available in chrome or black with matching or contrasting end caps, so you can find the combination that's perfect for your bike