Specifically designed for high mileage and severe use class 6-8 trucks and buses, this shock absorber is built to handle the demands of hardworking vehicles. With features like a robust hydraulic lock-out to prevent over extension of air bags, a nitrocarburized piston rod for longer service life, and reduced noise, vibration, and harshness, the Monroe Magnum shock absorber is a top choice for improving performance and durability.