Cobra PowrFlo 4-inch Mufflers for '17-Up Touring Models - Chrome 
Cobra's Huge slip-on mufflers add beef to your bike.
The 4.5 inch muffler body tapers to 4-inch round at the front with massive high flow 3-inch baffles inside for maximum performance and thunder!
Incredible deep sound due to the size and shape of the collector for enhanced low frequency tones...it's all about that bass!
Made in the U.S.A.
Backed by Cobra's limited lifetime warranty