Firestone replacement air springs are intended to replace an old, worn out, or defective air bag from your original firestone air bag kit.
Direct replacement for the factory air supports in a 1996 GM P30 Chassis. I can tell I now have less body roll when driving down the road. They were on the difficult side to install, because they mount inside the front coil spring. 5 hours for both sides. I would recommend this product.