The present invention provides reinforcing braces that may be attached to the factory-supplied chassis mounts for the lower control arms of the steering knuckles of vehicles to reinforce and shield the mounts from objects below the vehicle that may be encountered when traveling through rugged terrain. The braces of the present invention are designed for the front and rear control arm mounts, each brace including a pair of parallel sturdy metal flanges that are generally perpendicularly attached to a sturdy metal lower base plate. Each flange is designed to be attached to one of the flanges of the factory-supplied chassis mounts, and has an opening therein for receiving mounting hardware and strengthening of the camber adjustment structures. The sturdy metal lower base plates may extend out and away from the flanges of the brackets to provide a lower shield to protect the chassis and mounting hardware from damage that may occur from contact with large objects that may be encountered below the vehicle. The front base plate may include an elongated section that extends toward the front of the vehicle to provide a shield for deflecting large objects as the vehicle moves forward.