No matter the condition of your 1978 Seville, OPGI has the Mobile Electronics you need to boost performance and get you back on the road. We currently carry eighteen Mobile Electronics to choose from for your 1978 Seville, and our Price Match Guaranteed prices range from as little as $9.99 up to $229.99. OPGI offers Custom AutoSound plus four other trusted brands of Mobile Electronics for your 1978 Seville, 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 Mobile Electronics in person.