Substrate shape, geometry, positioning, and/or cell density to improve aftertreatment performance

A radial aftertreatment component comprising:

• a substrate having a radial exterior surface, and a radial interior surface defining a central axial inlet or outlet, the substrate including a channel formed therethrough from a first end at the radial exterior surface to a second end at the radial interior surface,
• wherein, in a cross-section of the substrate, the channel has an S-shape.

A radial aftertreatment component comprising:

• a substrate having a radial exterior surface, and a radial interior surface defining a central axial inlet or outlet, the substrate including a channel formed therethrough from a first end at the radial exterior surface to a second end at the radial interior surface,
• wherein the channel has a shape having at least a portion that is angled in a cross-section of the substrate, and
• wherein the channel comprises a first end and a second end opposite the first end, wherein the first end is larger than the second end.