2Pcs Bassani Adapters Reduce Sensor Ports Bungs 18MM To 12MM Fit For Harley Plug

2PCS Bassani Adapters Reduce 02 O2 Sensor Ports Bungs 18MM To 12MM Harley Plug

Steel Adapters Reduce 02 O2 Sensor Ports Bungs 18MM To 12MM Fits for Harley Plug

Chrome Stainless Adapters Reduce Sensor Ports Bungs 18MM To 12MM For Harley Plug

Bassani Manufacturing O2 Sensor Plugs - 18mm 1802P

2PCS Stainless Adapters Reduce Sensor Ports Bungs 18MM To 12MM For Harley Plug

1861-0594O2 Sensor Bung Adapter Kit O2 Sensor Bung Adapter Kit - 18 mm to 12 mm

Bassani Manufacturing O2 Sensor Port Plugs 12mm x 1.25 1202P 1861-0791