<p>The invention provides a catalyzed soot filter formed on a wall flow substrate having internal walls coated with catalyst compositions. A first catalytic coating is disposed on the internal walls of the wall flow filter substrate from the outlet end to a first coating end and extending for at least part of the length of the wall flow substrate and comprises a first co-formed ceria-zirconia-praseodymia composite and a first refractory metal oxide. A second catalyst coating is disposed on the internal walls of the wall flow substrate from the inlet end to a second coating end, thereby defining an inlet zone, wherein the inlet zone is no more than 50% of the length of the wall-flow substrate; wherein the second catalyst coating comprises a second platinum group metal component.</p>
