Oil pressure in the 6.0L Ford Powerstroke is not only used for lubrication, but also high pressure oil is used for fuel delivery. Pressure leaks from the factory ball valves can cause hard starts or even a no start condition. Restore operation of your high-pressure oil system with the Mishimoto High Pressure Oil Rail Ball Tube Set. This comprehensive kit includes 8 ball valves, 8 seals, and a removal/installation tool for a one-stop solution. The Viton O-rings withstand high temperatures and pressure, ensuring leak-free operation. Upgrade your Powerstroke's fuel delivery system with the Mishimoto High-Pressure Oil Rail Ball Tube Set and experience improved fuel efficiency, enhanced engine performance, and a renewed sense of reliability. Like all Mishimoto products, this kit is backed by a Lifetime Warranty.