ACDelco Advantage Gas Charged Shocks are the economical, twin-tube option for your passenger car, van, SUV, or light duty truck. These gas charged shocks include super-finished chromed piston rods, oil seal with integrated dirt wiper, durable piston valve assembly, and a drawn over mandrel (DOM) pressure cylinder. ACDelco Advantage Gas Charged Shocks are tested to ensure vehicle fit and quality ride.