The Beru Ignition Tune-Up Kit - 135171 is a comprehensive set of products designed to optimize the performance of a car's ignition system. It includes various components such as spark plugs, ignition coils, and ignition wires, all of which play a crucial role in the ignition process. These products work together to ensure a smooth and efficient ignition, resulting in improved fuel efficiency and overall engine performance. The kit also includes other essential items such as a distributor cap and rotor, which help to distribute the spark to each cylinder in the engine. By providing all the necessary components in one convenient package, the Beru Ignition Tune-Up Kit makes it easy for car owners to maintain and improve their vehicle's ignition system.