Cobra USA COB-6109RB 4" Neighbor Hater Slip-On Mufflers Black for Touring 17-UpDescription for Cobra 4" Neighbor Hater Black Slip On Mufflers A discerning rider knows that sometimes loud alone isn't enoughyour bike needs to sound good too. Cobra utilized extensive sound and dyno testing to create the 4" Neighbor Hater Slip On Mufflers, which provide look, sound, and perform unlike anything else on the market. These mufflers will make your Harley Davidson Touring motorcycle purr like a dragon. The 4" tubes bell out to 4 1 2" for