The Tunap MP18400100A Active Particulate Filter System is a professional, highly effective two-step cleaning solution designed for heavily soiled diesel particulate filters (DPF) and gasoline particulate filters (GPF). This comprehensive system includes the Tunap 184 DPF/GPF Active Particulate Filter Cleaning Fluid and the Tunap 185 DPF/GPF Active Particulate Filter Rinse. It is specifically formulated to dissolve and remove carbon and ash deposits, thereby improving engine efficiency, restoring filter function, and reducing harmful emissions.