Shocks were invented to make your ride a much smoother and more responsive one. The ultimate in shock absorbers is the Edelbrock shock absorber. This revolutionary shock absorber has the patented Inertia Active System (IAS) This innovative design is unique to Edelbrock. The IAS makes your shock smart. It can tell whether you are on a smooth or a rough road, and automatically makes adjustments to provide you with the best ride possible. On rough roads in makes the shocks softer and on smooth roads it makes the shocks firmer. It can even make adjustments mid wheel turn. If there is a sudden huge pothole, the system adjusts just to soften the blow of the one jolt. This is made possible by and adjusting valve. It increases or decreases the amount of oil that is flowing through the shock's coil. Traditionally you would have to choose which type of road that you usually face, and choose whether a firm or soft shock. Now you can get the best of both worlds. Make sure that your shocks are providing you the best handling and smoothness that is possible by installing an Edelbrock shock absorber. Car enthusiasts are entitled to professional technical help while buying high-quality auto parts from us. To support that need, we built a round-the-clock sales assistance desk to answer your needs. Everyone hates paying for shipping, so there is always completely free shipping for each order greater than $50. If you spot a lower price elsewhere, call us - we always beat any legitimate auto part price.