Catalytic Converter factory Introduction DOC catalytic converters are tested against the OEM to ensure that backpressure, temperature, and the regeneration performance meets, or exceeds, the standards set out by the original manufacturer. Many of our DPFs also feature value-added design enhancements, such as modular designs to facilitate cleaning 鈥?which further reduces operating costs. Details make according to the sample? A: Yes, we can produce according to your samples or technical drawings. We can manufacture moulds and fix