Don't risk using extensions because they usually don't work, this is a built-in real mini-catalytic converter. This O2 cel fixture with a miniature will make your ECU think the inventory catalytic converter is still installed. When you remove the catalytic converter, the rear O2 sensor will see higher temperatures and greater unburned fuel flow. The O2 cel fixture actually contains a miniature catalytic converter so if the real catalytic converter is damaged, the CEL eliminator can help you reduce gases.that helps to the annoying inspection of the engine light even if the high-flow catalytic converter is installed after modifying the exhaust gas or removing the catalytic converter. Therefore, this will throw an inspection engine light (Cel, , ), usually with error code P0420 ( system efficiency threshold library 1) and / or P0430 P0420 - system efficiency threshold library * for OFF ROAD It takes a long time to use.