Find a Pre-Filter for the cold air intake on your 1994-1998 Dodge 5.9L Diesel. Find the right pre-filter for your intake system by matching up your filter part number, or by using the filter dimensions. A pre-filter installs tightly over your air filter and serves as the first line of defense to keep larger debris out of your filter media and help extend cleaning intervals. Shop from brands like AFE, K&N Engineering, S&B, Banks, and others at XDP and find the perfect pre-filter for your air filter. Pre-filters are manufactured from a breathable material that lets air through while blocking large debris and contaminants.