Easy installation, direct bolt-on, no modification needed. Made of stainless steel which is durable and have high strength to use. Built-in M18X1.5 catalytic converter, helps to checking engine lights. DESIGN TO FIT MOST VEHICLE WITH THE M18X1.5 O2 SENSOR HOLE. OVER 99% SUCCESS RATE EVEN ON EXOTIC CARS AND EURO CARS. Built in Mini catalytic converter, avoid checking engine lights after modifying exhauster or removing catalytic converter. This O2 cel fix with miniature cat will trick your ECU into thinking the stock catalytic converter is still installed. When you remove your catalytic converter, your post O2 sensor will see higher temperatures and greater flow of unburnt fuel. As a result this will throw check engine lights (Cel, , ) typically the error codes will be P0420 ( System Efficiency Threshold Bank 1) and/or P0430 P0420 - System Efficiency Threshold Bank 2). But for OFF ROAD use only!!! Specification: Type: Oxygen Sensor Thread: X 1.5 Fitment Type: Direct Replacement Fitment: Universal All Models Colour:Silver Material:stainless steel Package Contents: 1x O2 Sensor Adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.