No matter the condition of your 1981 Bonneville, OPGI has the Radiators you need to boost performance and get you back on the road. We currently carry four Radiators to choose from for your 1981 Bonneville, and our Price Match Guaranteed prices range from as little as $31.99 up to $1,409.99. OPGI offers Cold Case Radiators plus one other trusted brands of Radiators for your 1981 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 Radiators in person.