Keep your filter safe from sand, mud, and other debris when you purchase a Pre-Filter to your cold air intake on your 2015-2019 Ford Transit 3.2L Powerstroke. Pre-filters feature a breathable construction with a free-flowing material that allow your filter to breathe while blocking out large debris and contaminants. 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. 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. Find the right pre-filter for your intake system by matching up your filter part number, or by using the filter dimensions.