With catalysts GM23, Opel used the Opel Corsa B and Opel Tigra models with 1.4 and 1.6 gasoline engines from 1995. The length of the cover is 33 cm and the width is 12 cm, which makes the shape rectangular

Catalyst KT0138 is used in German Mercedes cars. These catalysts have an asymmetrical, flat shape and many lateral convexities on the surface. The outlets are arranged in different planes (one is on the side, the other is angled upwards, looking