vehicle structural parts, namely, brake cams, quick release valves, relay valves, emergency relay valves, foot valves, shift valves, tractor protection valves, vacuum and air lines and fittings and air governors, repair kits for power steering boxes comprised of o-rings, gaskets, seal, and steering gears, tie rod ends and drag links, linkage, power steering pumps, gear boxes, suspension springs, struts and beams, drive line shafts, end yokes, stub shafts, U-joints, drive shaft tubing, slip yokes, weld yokes, end yokes, center and hanger bearings and cross and bearing kits comprised of a cross, end caps for the cross, needle bearings and snap rings