Harley Davidson Street Bob Exhaust Back Box Silencer 64757-09. The description of this item has been automatically translated. Customer service Mon – Sat. Harley Davidson Street Bob Exhaust Muffler Muffler 64757-09. HARLEY DAVIDSON DYNA STREET BOB Type: FXDB 1584. From year of construction 2009. If in doubt, please ask the friendly local Harley Davidson dealer! […]