Hotchkis Sport Suspension 1902 1978 - 1988 GM G - Body Lowering Coil Springs Set (4). Lower your Grand National El Camino Regal Cutlass or other 78 - 88 GM AG - Body car with Hotchkis Sport Suspension lowering coil springs. These springs will lower your vehicle on average 1 in. from factory ride height enhancing vehicle looks while lowering the center of gravity. The increased spring rates offer improved performance and handling while offering a comfortable ride. Each gray powder coated coil spring is precision wound using the highest quality steel. Specs 1 in. Lowered Front 600 lbin Rear 135 lbin. Motor Small Block or Big Block with Aluminum Heads and Aluminum Manifold. Note Wagons and El Camino's should not use rear springs without the use of 31750 air bag kit.