Sign Up to Get
10% Off Your Next Order!
+ 500 FREQUENT BUYER POINTS
Be among the first to receive Weekly Specials & OPGI News.
10% off restoration parts only. 500 Frequent Buyer Points added after promotional order ships. See welcome email for full details.
Sign up for texts from OPGI, and get all our best offers and more!
By subscribing to OPGI text messaging at 80205, you agree to receive recurring autodialed marketing text msgs (e.g. cart reminders) to the mobile number used at opt-in. Consent is not a condition of purchase. Msg frequency may vary. Msg & data rates may apply. Reply HELP for help and STOP to cancel. See Terms and Conditions & Privacy Policy.
No matter the condition of your 1978 Regal, OPGI has the Differential & Rear-End Components you need to boost performance and get you back on the road. We currently carry 49 Differential & Rear-End Components to choose from for your 1978 Regal, and our Price Match Guaranteed prices range from as little as $6.99 up to $4,859.99. OPGI offers Prothane plus ten other trusted brands of Differential & Rear-End Components 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 Differential & Rear-End Components in person.
BEST DEALS OF THE SEASONHAPPY HOLLEY DAYS
Find parts that fit your vehicle
Holiday Bonus