Works well for vehicles with cat-control function to avoid an error in the system in general. (Please note that a 100% guarantee can´t be given that the cat monitoring of your vehicle does not report any errors!)

optionally:

Oxygen-Sensor-Emliminator / Spacer ( 45° ) with integriated ceramic-mini-catalyst 600CPSI and EU5 coating.

or

Oxygen-Sensor-Emliminator / Spacer ( 45° ) with integriated metall-mini-catalyst 300CPSI and EU6 coating.

We offer this part exclusively for motor sport vehicles outside the StVZO.
By purchase, you confirm that you are not using this item for a vehicle that is used on public roads.