2004 6.0L Power Stroke – FUEL MANAGEMENT SYSTEM – Wavy High-Pressure Rail

• The high-pressure rail has been redesigned to reduce noise through the high-pressure oil system.
• The volume wavy high-pressure rail has increased from 15 cubic inches to 30 cubic inches. This reduces pressure         fall-off during injection and improved emissions and fuel economy.
• NOTE: The larger volume oil rail will increase engine start time after the high- pressure oil rail has been drained        during the process of any repairs.