Bilstein B6 4600 shock absorbers are designed as a direct fit upgrade to OE shock absorbers on stock height light trucks and SUV’s. These shock absorbers feature a monotube design which provides consistent fade free performance. B6 4600 shock absorbers utilize a unique, velocity sensitive, digressive piston which reacts to changing road conditions. All B6 4600 shock absorbers are tuned for each specific application to ensure optimal performance is achieved. B6 4600 shock absorbers offer a significant improvement in ride quality, handling, and comfort. Compatible with 2003-2010 Durango (HB) w/ STandard Chassis, 2006-2009 Chrysler Aspen. With over six decades of experience in original equipment and more than fifty years in motorsport, Bilstein's products and services are distinguished in the market. The Bilstein B6 Suspension shock absorber is the perfect gas-pressure solution for those who demand excellence in both performance and comfort, even under pressure. Each damper is meticulously fine-tuned during Bilstein's road testing process.