JLR9899 310-198 310-199 Fuel Injector Seal Install Tools for Jaguar/Land Rover 3.0L & 5.0L Engines, Use To Replace The Fuel Injector Teflon Seals, 2PCS. EASY OPERATION - Professional design tools ensure precise and secure fit, help quickly & smoothly remove and replace the teflon seals on the direct injection fuel injectors on your model.