Get your semi Ready for the Road Ahead™ with an ultra-smooth and comfortable ride, with the Monroe Gas-Magnum® 65 Series Shock Absorber. Due to its performance-focused design, this replacement shock is able to act as a load-adjustment piece that dampens the bouncing motion of a vehicle after it passes over a bump. Engineered with rugged precision parts to reduce vibrations and keep your suspension at its best in all types of conditions. FleetPride is your First Click in Heavy Duty®.