Weld-in Frame reinforcement for inside of drivers frame rail. For the ultimate in unibody reinforcement, this combines with our frame reinforcement kit, or other brand of outside frame plating and covers the whole inner side of the drivers frame rail from the motor mount forward. We keep going where others stop though. Our plate is designed to be bent around the upper angled section of frame, where others simply don't bother. This plate welds in place and eliminates the need for a separate steering box spacer.