1978 Mercury Zephyr Engine Additives
Keep Your 1978 Mercury Zephyr in Top Shape with Quality Engine Additives
Whether you’re repairing or upgrading your Engine Additive, using high-quality parts is key to keeping your 1978 Mercury Zephyr looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Posi Units and Components. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Competitive Prices and Extensive Inventory
The average price for a 1978 Mercury Zephyr Engine Additive at Advance Auto Parts is around $469.99, with a range that starts at $7.99 and goes up to $931.99. With 2 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Dropout Housing Stud For Ford 8" & 9" and Grizzly Locker For Ford 8" With 28 Spline Axles start at just $7.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Engine Additive, don’t forget to check out other key components like Coolant/Antifreeze and Fluids. At Advance Auto Parts, we’re here to help you keep your 1978 Mercury Zephyr in peak condition, inside and out.
Find Your Specific 1978 Mercury Zephyr Engine Additives
Looking for the perfect Engine Additive for your 1978 Mercury Zephyr? You’re in the right place. Below, you’ll find links to various types of Engine Additives that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Engine Additives, ensuring durability and a precise fit for your Mercury Zephyr. Whether you’re driving a 1978 model or another popular model year like
1979,
1980,
1981,
1982, and
1983, we’ve got you covered. Purchasing Engine Additives from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Engine Additives that fit your vehicle.
Essential 1978 Mercury Zephyr Engine Additives
Yukon Gear – Dura Grip For Ford 7.5" (Part No.26034)
from
$789.99
The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence & performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction. The Yukon Dura Grip uses a nodular case and forged 4320 in
Product Features:
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Product Features:
- Fits Ford 7.5″
- 28 spline
- 4-spring, clutch style positraction
- Internal gears are manufactured using forged 4320 steel and cut to provide stronger teeth
- Fully rebuildable
- Assembled in the USA
Yukon Gear – Dropout Housing Stud For Ford 8" & 9" (Part No.32338)
Yukon Gear – Grizzly Locker For Ford 8" With 28 Spline Axles (Part No.28006)
from
$931.99
The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000!
Product Features:
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Product Features:
- Fits Ford 8″ with 28 spline axles
- Patented internal design reduces common locker failures
- 8620 internals for added strength
- Assembled in the USA
Popular 1978 Mercury Zephyr Engine Additives Categories
Most Popular Posi Units and Components for 1978 Mercury Zephyrs
Enhance your 1978 Mercury Zephyr with one of the 2 Posi Units and Components we have in stock, starting at just $7.99.
Yukon Gear – Dropout Housing Stud For Ford 8" & 9" (Part No.32338)
Yukon Gear – Grizzly Locker For Ford 8" With 28 Spline Axles (Part No.28006)
from
$931.99
The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000!
Product Features:
See More
Product Features:
- Fits Ford 8″ with 28 spline axles
- Patented internal design reduces common locker failures
- 8620 internals for added strength
- Assembled in the USA
FAQs for 1978 Mercury Zephyr Engine Additives
What are the best-selling Engine Additives for 1978 Mercury Zephyrs?
Out of 2 Engine Additives that fit 1978 Mercury Zephyrs, the following parts are the top sellers:
- Dropout Housing Stud For Ford 8" & 9" (11643043) – $7.99
- Grizzly Locker For Ford 8" With 28 Spline Axles (11644263) – $931.99
What’s the price range for 1978 Mercury Zephyr Engine Additives?
The prices of Engine Additives for the 1978 Mercury Zephyr range from $7.99 up to $931.99 for the most premium parts.
What is the average price of an Engine Additive for a 1978 Mercury Zephyr?
The average price for Engine Additives for the 1978 Mercury Zephyr is $469.99. Keep in mind the variety of part types within our Engine Additive category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Engine Additives for other Mercury Zephyr model years?
What are the cheapest Engine Additives for my 1978 Mercury Zephyr?
The cheapest 1978 Mercury Zephyr Engine Additives we carry are:
- Dropout Housing Stud For Ford 8" & 9" (11643043) – $7.99
- Grizzly Locker For Ford 8" With 28 Spline Axles (11644263) – $931.99
Does Advance Auto Parts sell Engine Additives for any other 1978 Mercury models?
Yes. We stock Engine Additives for 4 other popular 1978 Mercury models. Some of the most popular are 1978 Cougar Engine Additives, 1978 Grand Marquis Engine Additives, 1978 Marquis Engine Additives, 1978 Monarch Engine Additives, and 1978 Bobcat Engine Additives.
What types of Engine Additives do you sell for my 1978 Mercury Zephyr?
We currently have just 1 Engine Additive in stock for a 1978 Mercury Zephyr, and as of 11/2/25, it is a Posi Units and Component.
Can I get help with 1978 Mercury Zephyr Engine Additive orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercury Engine Additives and more.
What is your return policy for Mercury Zephyr Engine Additives?
Advance Auto Parts keeps returns simple. For new Mercury Zephyr Engine Additives and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.