OTC's 5831 Injector Puller is used to remove injectors from the cylinder head on select Navistar MaxxForce, N10, N13, N9, and International A engines. Includes 2 Flange Nuts size M12 x 1.75. Some engines may need part number 12-453-01-01 (not included) to assist with injector removal on engines equipped with a composite valve cover. Similar to Navistar OE tool number ZTSE4770.