Not just a skin, a complete reproduction of the original quarter panel including the sail panel! That's right, a complete quarter panel assembly that's ready to install! When General Motors discontinued this popular item a few years back, you could either pay the high price for an original NOS panel or resort to the overseas quarter skins, which were less expensive but difficult to install. OER changes all that by manufacturing an authentic complete quarter panel, including every component found on the original panel. Each reproduction quarter panel includes correct door jamb area, sail panel for coupe models, side marker cut-out when applicable, reinforced bumper bracket area, and more! OER built the tooling, we control the quality! This product is Officially Licensed by General Motors. Each panel comes EDP coated for rust prevention.