Monroe Reflex shocks are offered in both a twin tube & monotube design. These Reflex shocks are designed as replacements the factory shocks of trucks & SUVs with a higher center of gravity to improve handling and performance by reducing body roll and dive.Monroe twin tube Reflex shocks use unique ASD technology that allows the shock absorber to react much faster than your factory shock. Reflex monotube shocks utilize a high-pressure gas charge designed to keep the internal oil and nitrogen gas separate, ensuring added spring rate for improved damping efficiency and control. They also feature a hydraulic lockout that cushions the impact which ensures superior road gripping along with a safer and more stable ride.Monroe Reflex monotube & twin tube shocks come backed by a limited lifetime warranty and will make great replacements for your factory shocks. Order a pair for your truck today! | Monroe Reflex Shock 911151