18mm to 12mm Bushing Adapter For O2 Sensor Port- Harley Davidson

18mm to 12mm Bushing Adapter For O2 Sensor Port- Harley Davidson Bagger/ Dyna/ V-Rod (12 and newer)

Dstar Adapters Reducers O2 Sensor Bungs - 18mm To 12mm for Harley Stai – dstarcustoms

18mm to 12mm Bushing Adapter For O2 Sensor Port- Harley Davidson Bagg

2pcs 18mm to 12mm O2 Port Plugs Bungs : Automotive

Adapters Reduce 02 O2 Sensor Ports Bungs 18MM - 12MM Harley Plug stainless steel

Motorcycle & Harley Exhaust - Get Lowered Cycles

Harley-Davidson Oxygen Sensors & Accessories - Dennis Kirk

Bassani 18mm To 12mm O2 Sensor Bung Adapter For Harley Exhaust - RevZilla

2pcs 18mm to 12mm O2 Port Plugs Bungs : Automotive

Bassani O2 Port Bushing Adapter - 102P2 Harley-Davidson Motorcycle - Dennis Kirk