Disassemble and Assemble the injector sleeve quickly and easily with the Injector Cup / Sleeve Puller and Driver set. The Puller threads into the old cups to remove them from the bore of the engine. The driver sets the new cups into the bore where your previous cups were. This tool is used on 3406E C10 C12 C15 C-16 and C-18 Engines. Package includes 9U6877 Thrust Bearing, 9U7258 Driver Cap, 221-9778 Puller Stud, 4K-0367 Nut - Full, 5P-8247 Hard Washer, 128-7889 Puller Bridge.