With simple structure design, O2 sensor spacer is easy for you to install by straight bolt-on without modification.This product features M18x1.5mm threads, allowing you to screw your oxygen sensor into the spacer and then the spacer into your exhaust.Made of highly polished metal, it is corrosion-resistant and durable.The length of the product is 3.2cm.It fits all standard oxygen sensors (most modern vehicles are fitted with M18x1.5mm threaded oxygen sensors). And it is a must need for any off-road vehicle running a high flow cat, sport exhaust, down pipe or a straight pipe.Item Name: O2 Sensor SpacersMaterial: MetalThread: M18 X 1.5Features: Universal, Threaded, Easy InstallationSize Details: Length: 3.2cm/1.26" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:2 x O2 Sensor Spacers