ITEM NAME:O2 Oxygen Sensor Restrictor Extender Extension Simulator Fittings Flow Inserts O2 Oxygen Sensor Restrictor Spacer Extender Extension Simulator Adapter Tool Fittings Flow Inserts SPECIFICATIONS.O2 Oxygen Sensor Restrictor Spacer Extender Extension Simulator Adapter Tool Fittings Flow Inserts. They are very easy to install by unscrewing your O2 Sensor from your exhaust then screw your sensor into the extender,and then screw the two pieces back into your exhaust, that's all !
