These KellTrac Spec Viking shocks for the Ford F-150 Trucks help stabilize the rear axle within the chassis, which leads to better ride quality, better towing and better performance! By retaining the OEM style mounting locations, we can offer the longest stroke double adjustable shock in the industry. A major issue that we see with other offerings on the market is that they drastically reduce shock travel availability on both compression and rebound, and they also drastically change the geometry and working angle force of the shocks – which lessens their ability to combat erratic axle movement under heavy load use (axle wrap). On a leaf spring vehicle with a light chassis out back, it is important that you use a powerful shock that has proper working angle to help with higher horsepower loads. Whether you are a spiritedly street cruising, street racing or towing, these Street Series Viking Shocks by KellTrac will significantly improve the performance and feel of your F-150 Truck!