I have a 18 Road Glide Special,Mines Very Quiet,No Eng. Noise at all,With these new Heads very little noise,So much Quieter than my 103 Twin Cam,A whole different engine,I put Rinehart SlimLine Duals sounds Good especially behind it but not Loud like my 103 Due to so much less Eng. Noise.Its the 4 valve Heads With Dual Plugs lot less noise,You should not be hearing that Racket take it to your dealer have it looked at.I put a 14 in. Klock Werx Sport Tour Windshield,That cut the Wind down Big Time.
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2018 Wicked Red Road Glide Special 14 in.Yaffe Monkey Bars,Rinehart Slimline Duals,Power Vision Dynoed,Arlen Ness Big Sucker,Mustang seat,!4 in. Klock Werks Sport Tour Windshield.Cerwin Vega B52,Infinity Kappas.