Like Alliant Power AP0007 Fuel Filter Drain Valve Seal Kit (Viton), for late model Ford 7.3L Power Strokes. This kit covers 1998-2003 applications and is comprised of seals contained in Ford kits F81Z-9C065-AA. This seal kit uses Viton O-rings to prevent the deteriation due to ULSD Fuels. Viton fluoroelastomer is the most specified fluoroelastomer, well known for its excellent (400°F/200°C) heat resistance. Viton offers excellent resistance to aggressive fuels and chemicals. Ford Part Number: F81Z-9C065-AA Includes: 2 - Drain Valve O-Rings 2 - Fuel Heater O-Rings 1 - Pressure Relief Valve O-Ring 4 - Fuel line Grommets