Looking to replace or upgrade your coil springs? These are the same springs we use in our Camburg kits for the Ford F-250/350’s. We developed these for increased useable wheel travel, a reduced block height, less bowing of the spring and reduced stress levels to minimize material fatigue over the years of being used. These are Made in the USA using the highest grade spring steel available, are cold wound, heat-treated, shot peened to stress relieve and powder coated black.