Find a Pre-Filter for the cold air intake on your 2019-2023 Ram 6.7L Diesel. Get the right pre-filter for your intake by matching up the filter dimensions, or by using the filter part number. Pre-filters from AFE, K&N Engineering, Banks, and others are all available at XDP. A pre-filter provides your vehicles engine, air intake system, and air filter with the protection it needs from large airborne contaminants while also helping to extend cleaning intervals. Pre-filters feature a breathable construction with a free-flowing material that lets air through while blocking larger contaminants.