Bendix 3030 EnduraSure Long Stroke Spring Brake Piggyback Kit keeps you Ready for the Road Ahead , as the perfect choice for heavy duty trucks and trailers. This kit provides increased performance and better control of air pressure, allowing for increased brake force and improved stopping power. The high-quality spring brake mechanism ensures reliable and consistent brake engagement and release, making it easier to integrate the spring brake actuator and service brake chamber. FleetPride is your First Click in Heavy Duty .