Ford 6.4L 08-10 Nozzle SET: Custom nozzle set built to spec, intended for 875 RWHP or greater applications. Off-road, high performance applications only! Use of dual high pressure injection pumps & custom tuning is mandatory. Recommend testing health of injectors prior to install of new nozzles. NO WARRANTY or RETURNS! Sold as a matched set & includes set of copper washers.