Monroe GasMagnum shocks are engineered to give you smoother driving stability and control on your truck or van These shocks with their 1 38 bores have up to twice the capacity compared to standard 1 bore shocks Thanks to special modifiers the fluid reduces friction providing smoother rod reaction Theyre also equipped with a larger sintered iron piston that is much stronger than the traditional metal The shock absorbers are nitrogen gascharged as well for better tiretoroad contact and improved ride A better valving range on shock compression and extension also helps provide a smooth comfortable ride Monroe GasMagnums are also equipped with a selflubricating fluid seal designed to prevent loss of gas pressure without excessive wear