12 land vehicle power steering systems composed of electronic control modules, power steering valves, valve housings, solenoid valves, input shafts, sleeves, torsion bars, sleeve re-action springs, and sleeve damping pistons; components and parts for land vehicle power steering systems, namely, electronic control modules, power steering valves, valve housing, solenoid valves, input shafts, sleeves, torsion bars, sleeve re-action springs, and sleeve damping pistons