The OTR 13.9" Diesel Particulate Filter is designed to provide superior performance and durability. This filter is engineered with flanges to guard against leakage and is approved for horizontal, vertical, or dual installations. It features an advanced engine catalyst and is constructed with high grade stainless steel for maximum durability and corrosion resistance. This filter is the perfect choice for any diesel engine, providing superior performance and long lasting reliability. FleetPride is your First Click in Heavy Duty®.