Keep your filter safe from sand, mud, and other debris when you purchase a Pre-Filter to your cold air intake on your 1989-1993 Dodge 5.9L 12V Cummins. Purchase pre-filters from AFE, K&N Engineering, S&B, and many others at XDP! Finding the right pre-filter for your intake can be done by matching up filter dimensions or by using the corresponding filter part number. Pre-Filters are installed over top of your air filter and serve as another layer of protection from airborne contaminates that could otherwise damage your filter, air intake, or engine. Pre-filters are manufactured from a breathable material that lets air through while blocking large debris and contaminants.