Bilstein BE5-6500-H0 Heavy-Duty Gas Shock Absorber
Bilstein heavy duty gas shock absorber instantaneously self-adjusts to changing road surfaces for a better ride.  It features a super damping ability that makes it ideal for heavy hauling for occasional off-road use, while maintaining an exceptional "street" feel.  The mono-tube design keeps the performance top-notch and does not gradually decline from age, use or heat, requiring no compensating manual adjustments.