Equip your truck with a simple way to reduce exhaust emissions, with the OTR Diesel Oxidation Catalyst with Expertise Built In™. Due to its advanced system that acts like a catalytic converter, this replacement device is able to convert harmful pollutants into less dangerous substances before they are expelled from a vehicle. Fashioned with a modular design that is suitable for a horizontal, vertical, or dual installation. FleetPride is your First Click in Heavy Duty®.