Pre-Filters help to prevent sand, mud, and dirt, from contaminating the air filter in your 2004.5-2007 Dodge 5.9L Diesel. XDP carries pre-filters from manufacturers such as AFE, K&N Engineering, and many more! A pre-filter is installed over your air filter and helps to extend cleaning intervals while also blocking out large debris that might otherwise damage your air filter. Pre-filters feature a breathable construction with a free-flowing material that allow your filter to breathe while blocking out large debris and contaminants. Get the right pre-filter for your intake by matching up the filter dimensions, or by using the filter part number.