No matter the condition of your 1978 Regal, OPGI has the Air Filter Elements & Wraps you need to boost performance and get you back on the road. We currently carry 30 Air Filter Elements & Wraps to choose from for your 1978 Regal, and our Price Match Guaranteed prices range from as little as $2.99 up to $249.99. OPGI offers K&N plus seven other trusted brands of Air Filter Elements & Wraps for your 1978 Regal, 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 Air Filter Elements & Wraps in person.