S&S CYCLE 4-1/2" GNX Slip-On Mufflers - Guardian Black 550-1078

4-1/2" GNX Slip-On Mufflers - Guardian Black Muffler bodies measure a full 4-1/2" outer diameter, Unique louvered baffle delivers a more aggressive tone, even with stock head pipes, S&S racing heritage-styled end caps with a tuxedo black finish, SAE J2825 sound level compliant (with included dB installed); dB reducer is removable , Made in U.S.A.