Dinex Diesel Particulate Filters (DPF) and Diesel Oxidation Catalyst (DOC) are high quality, direct fit units to ensure easy installation and offering the best in overall performance in the removal of soot from exhaust gas of the diesel engine protecting the engine, fuel injectors, turbochargers as well as the environment! Always in stock to decrease downtime! NOTE: This product is NOT certified for use in California and cannot be shipped there.