Add years of life to your Ford F-250, F-350 & Excursion 6.0L diesel engine with this Water Coolant Filter Bypass System. Removing contaminates such as the casting sand and metal shavings left over from the manufacturing process means your water pump, EGR cooler and engine oil cooler will all last longer. This kit is designed to bypass and filter small amounts of coolant while your Ford Powerstroke engine is running.