FGT 6896 Ford 6.0L High Pressure Oil Rail Adapters Leak Test Kit (Fuel Rail) Pair of High Pressure Oil Rail Adapters which are needed to connect to the oil rail to test for leaks High Quality CNC Machined from Billet Brass and Stainless Steel Allows observation of the High Pressure Oil System's Injector Control Pressure (ICP) by direct gauge connection, and facilitates testing of the High Pressure Oil System for leaks using shop air. Both adapters use standard 1/4" NPT air hose connection Includes both thread sizes that can be used on both vehicle platforms (changed in 2004)