In vehicles with EURO 3 and higher vehicle emission standards, the second lambda oxygen sensor emulator is located after the catalytic converter. It plays a diagnostic role. If it detects any irregularities based on data from the engine control unit, it displays an error on the dashboard and the engine may go into limp mode (depending on the car brand). This is often manifested by a large drop. These problems arise when removing the catalytic converter, its low efficiency or its replacement with a jet pump. In such situations, it becomes necessary to install THE SECOND OXYGEN SENSOR EXTENDER. The catalytic converter can effectively reduce power by 2 to 3% and top speed by up to 5%. Removing it and using the emulator is the easiest way to raise at low cost; The emulator can also help with problems with the LPG installation, which due to the detection of too much mixture will show CHECK ENGINE on the dashboard. Polished front surfaces that allow perfect tightening. Washer in the set, possibility to adjust the angle of screwing into the extender. The threads are made with dedicated tools, perfect accuracy and repeatability. Exhaust inlet hole 2 mm; In extreme situations, narrowing the inlet prevents engine failure (driving at high speed). Perfect for tight spaces where there is no room for straight extenders Installation: Unscrew the lambda oxygen sensor, screw the emulator into its place and then screw in the oxygen sensor. The extenders are from Internal and external thread: M18x1.5 Height: 40 mm Weight: 130 g color: Brass color Material: metal Package contents: 1 * Oxygen sensor extender 1 * washer 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 to be a little different from the real thing. The allowed measurement error is +/- 1-3 cm.