The Bosch Fuel Injector Kit - 140657 is a comprehensive set of products designed to service the fuel injection system of a car. It includes various components such as fuel injectors, o-rings, seals, gaskets, and other necessary parts to effectively clean and maintain the fuel injectors. The kit is suitable for use on a variety of car models and helps to improve fuel efficiency, engine performance, and overall vehicle functionality. It is a complete solution for addressing fuel system issues and ensuring smooth operation of the car.