Division 4.3.3 Replacement pollution control device technology family

The manufacturer may identify a replacement pollution control device technology family, to be identified by basic characteristics which shall be common to devices within the family.

To belong to the same replacement pollution control device technology family the replacement pollution control devices shall have the following:

1. (a)

   the same emissions control mechanism (oxidation catalyst, three-way catalyst, particulate filter, selective catalytic reduction for NO_x, etc.);

2. (b)

   the same substrate material (same type of ceramic, or same type of metal);

3. (c)

   the same substrate type and cell density;

4. (d)

   the same catalytically active materials and, where more than one, the same ratio of catalytically active materials;

5. (e)

   the same total charge of catalytically active materials;

6. (f)

   the same type of washcoat applied by the same process.