Beneath the Corvettes fiberglass body is a steel framework, commonly referred to as the birdcage, supporting the fiberglass panels. Inadequate sealing of the windshield often allows water intrusion leading to rust in the windshields steel frame. This1968-1982 Corvette Windshield RH Pillar/Header Corner Frame Assembly is direct replacement unit to restore your windshield frame structure. Unit welds in place as original.