Cobra Race Pro 4-inch Mufflers for '17-Up Touring Models -Chrome 
Race Pro mufflers start as 4-inch and bell out to 4 1/2 inches on the end to show onlookers the true business end of your ride.
3-inch baffles insure a deep down rumble and throaty tone that will turn heads
The custom black "clamshell" mounting bracket sets is eye catching, with its black thin-line tip bolted in with seven 12-point zinc plated bolts for a truly race inspired look.
Simple, quick installation!
All Cobra exhausts systems are made in the U.S.A.
Comes with a limited lifetime warranty that even covers discoloration.