He's going for gold... you'd think he would check thread dates by now...
As to earplugs? I like the EarPeace M - Motorsports ear plugs if I going to be running highway speeds.
2016 Electra Glide Ultra Classic FLHTCU
Rush Racing headpipes (HO7017)
A.N. Big Sucker II PN: 18-511
ThunderMax ECM PN: #309-562
Full Boar slip-ons