I put my LRS Ultra Recurve 9" on the Street Glide the other day, great service from the company and all I can say is wow! Ear plugs no longer required, a tiny bit of buffeting left that will be cured with dragon wings, feels like a new bike, I can hear the motor now and use a blue tooth headset, has to be the most worthwhile upgrade I have ever had on a bike, I can even ride in the rain without a face mask, just wish I had had it for the ride back from PCB last week as we hit a big old rain storm.