KING coil springs are manufactured to their specifications in the USA using the finest quality, high tensile, chrome silicon wire available. KING Shocks coil springs are specifically wound for off-road applications, not repackaged car springs. King spring rates, wire diameters and coil lengths have been developed through extensive real world testing on all types of terrain. KING Shocks race winning designs have been put to the test in the heat of battle from Baja to Dakar.