Maxtrac Suspension Twin-tube Shocks were designed as an affordable upgrade replacement for the factory shock when lifting or lowering your Truck or SUV. Manufactured using a gas pressurized twin-tube design, this Shock has a larger diameter piston to provide better dampening and rebound when compared to stock. Engineered with pre-set damping, this non-adjustable Shock will provide more than capable handling during normal and performance driving situations.