The GB Remanufacturing Fuel Injector Kit - 135865 is a comprehensive kit designed to service and improve the performance of a car's fuel injectors. It includes four high-quality products that work together to clean, restore, and maintain the fuel injectors for optimal functioning. The kit contains a fuel injector cleaner, a fuel injector seal, a fuel injector O-ring, and a fuel injector spacer. These components are carefully selected and designed to work with a wide range of car models, making it a versatile and reliable choice for car owners. With this kit, car owners can expect improved fuel efficiency, smoother engine performance, and reduced emissions. It is an essential kit for any car owner looking to maintain and prolong the life of their vehicle's fuel system.