The OTR Diesel Oxidation Catalyst for MaxxForce 13 engines ensures you are Ready for the Road Ahead™, working with the diesel particulate filter to release heat for soot regeneration. The diesel oxidation catalyst is built to decrease system back pressure while reducing emissions of hydrocarbons, carbon monoxide, soluble organic fraction, carbon monoxide, and unregulated contaminants in heavy duty, Class8 trucks. FleetPride is your First Click in Heavy Duty®.