No matter the condition of your 1981 Monte Carlo, OPGI has the Nitrous Oxide products you need to boost performance and get you back on the road. We currently carry six Nitrous Oxide items to choose from for your 1981 Monte Carlo, and our Price Match Guaranteed prices range from as little as $26.99 up to $419.99. OPGI offers Edelbrock plus zero other trusted brands of Nitrous Oxide products for your 1981 Monte Carlo, 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 Nitrous Oxide items in person.