A1 Cardone 6D-17000 Remanufactured Diesel Particulate Filter, 1 Pack Each unit is flow tested to on-car exhaust levels before and after the remanufacturing process to verify it meets OE performance specs Parts are cleaned using advanced technology to remove loose particulate matter and baked at high temperatures for extended time periods to reach required performance levels Exhaust hangers and sensor mount holes are welded, where necessary, to return each part to factory fit and function All applicable, OE-quality temperature sensors and sealing gaskets are provided to ensure a complete repair. After reassembly, units are media blasted and coated to preserve exterior appearance and increase corrosion protection A Diesel Particulate Filter (DPF) is a filter designed to reduce diesel particulate matter or soot to an allowable amount for release into the atmosphere through the exhaust stream. Most DPFs utilized by O.E. manufacturers are designed to remove 85% or more of soot under specific conditions. The accumulated soot is burned off at high temperatures, leaving only a residue of ash. This process renews the filter, so it is prepared to take on more matter. The DPF needs to be cleaned regularly, through a process called regeneration. Air, fuel and oil filters must be replaced at specified intervals as stated by the O.E. service manual. Monitor fuel and oil consumption. Excessive consumption could indicate an issue with the DPF. Ensure correct fuel type is being used. Perform periodic inspections of the exhaust. Repair any leaks. Perform engine valve train adjustments at specified intervals as stated by the O.E. service manual.