Steering Gear with Cylinder Assist Ports Fits 1980 to 1997 Ford trucks;Tested for proper flow balance;Components are inspected for wear, and are magnafluxed to find cracks that are not normally visible;O.E. spool valves are completely dis-assembled, inspected, modified with proper T-bar, reassembled and tested for proper flow balance PSC Steering PSC Steering Steering Gear with Cylinder Assist Ports - SG520R SG520R Steering Box