The Valeo Bi-Xenon Refresh Kit - 138171 is a comprehensive kit designed to enhance the lighting system of a car. It includes a variety of products that work together to improve the performance and appearance of the car's headlights. The kit contains two bi-xenon bulbs, two ballasts, and two igniters, all of which are essential components of a bi-xenon lighting system. These products are designed to provide brighter and more efficient lighting compared to traditional halogen bulbs. The kit also includes a wiring harness, which ensures proper installation and connectivity of the bi-xenon system. Additionally, the kit comes with a set of mounting brackets and screws for easy installation. With all these components, the Valeo Bi-Xenon Refresh Kit is a complete solution for upgrading the lighting system of a car.