RACK AND PINION STEERING SHAFT/TIE ROD FAILED AFTER RIGHT FRONT TIRE GLANCED A STANDARD STREET CURB CAUSING THE DRIVER TO LOOSE CONTROL AS THE VEHICLE SKIDDED ACROSS FIVE LANES OF TRAFFICE BEFORE COLLIDING WITH OPPOSING TRAFFIC. OWNER HAD RODS TESTED, AND TESTS SHOW NUMEROUS IMPURITIES AND METALLIC FLAWS.