No matter the condition of your 1966 Bonneville, OPGI has the Plugs you need to boost performance and get you back on the road. We currently carry seven Plugs to choose from for your 1966 Bonneville, and our Price Match Guaranteed prices range from as little as $5.28 up to $53.99. OPGI offers RESTOPARTS plus three other trusted brands of Plugs for your 1966 Bonneville, 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 Plugs in person.