No matter the condition of your 1966 GTO, OPGI has the Quarter Panels you need to boost performance and get you back on the road. We currently carry 28 Quarter Panels to choose from for your 1966 GTO, and our Price Match Guaranteed prices range from as little as $8.99 up to $1,469.99. OPGI offers RESTOPARTS plus one other trusted brands of Quarter Panels for your 1966 GTO, to help you find quality parts you can rely on. With OPGI's 45-day return policy and thousands of customer reviews, you can shop with the utmost confidence. Enjoy parts delivered directly to your home, or visit our sunny Southern California Showroom & Warehouse to check out our Quarter Panels in person.