Description: 1. Dont take a chance: on using an extension only as often they do not work. 2. This O2 cel fix without miniature cat: will trick your ECU into thinking the stock is still installed. When you remove your catalytic converter, your post O2 sensor will see higher temperatures and greater flow of unburnt fuel. 3. For Off road use only: as a result this will throw check engine lights typically the error codes will be P0420 (catalyst system efficiency below threshold bank 1) and/or P0430 P0420-catalyst system efficiency below threshold bank 2). 4. Function: check engine light repair; and pelase note this does not bring miniature cat. 5. Durable material: mad of stainless steel material, strong and anti rust. Installation method: 1. Find the position for sensor spacers. 2. Take off the old sensor spacer. 3. Put on the new sensor spacer to the car. 4. Install the sensor spacer on the bolts, then finish. Specifications: Product name: oxygen O2 sensor adapter Material: stainless steel Color: silver Size(approx.): length 46.5mm/1.83inch, outer thread M18x1.5, inner thread M18x1.5 Package Included: 1 PC x Car Oxygen O2 Sensor Adapter