The OTR 13.9" Diesel Particulate Filter is designed to provide superior filtration and performance. This filter is constructed from high-grade stainless steel for maximum durability and corrosion resistance. The engineered flanges guard against leakage and are approved for horizontal, vertical or dual installations. This filter is designed to meet the highest quality and performance standards, ensuring your engine runs smoothly and efficiently. FleetPride is your First Click in Heavy Duty®.