This kit contains 100% over horsepower nozzle tips that are designed to replace the stock nozzle tips on your 6.0L Ford Powerstroke injectors. The nozzle tips are made from high-quality materials and are designed to provide improved performance and fuel efficiency. This kit is specifically designed for high performance and is intended to be a performance upgrade for your 6.0L Ford Powerstroke injectors. The kit comes with copper washers that are necessary for installation, and it is backed by a fitment-only warranty. With this kit, you can upgrade your 6.0L Ford Powerstroke injectors to deliver improved performance and fuel delivery.