1978 Mercury Cougar Engine Additives
Keep Your 1978 Mercury Cougar 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 Cougar 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.
Top-Rated Engine Additives from Trusted Brands
Looking for a reliable Engine Additive? We’ve got you covered with options from brands you know and trust like Powertrax. For example, Powertrax Engine Additives start at just $444.99 with an average 5.0 star rating. With over 6 reviews and a solid 5 star average, you can shop with confidence knowing other Mercury Cougar owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1978 Mercury Cougar Engine Additive at Advance Auto Parts is around $521.99, with a range that starts at $444.99 and goes up to $668.99. With 3 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Grip LOK Traction System and Grip LS Traction System start at just $451.99 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 Cougar in peak condition, inside and out.
Find Your Specific 1978 Mercury Cougar Engine Additives
Looking for the perfect Engine Additive for your 1978 Mercury Cougar? 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 Cougar. Whether you’re driving a 1978 model or another popular model year like
1989,
1990,
1991,
1992,
1993,
1994,
1995,
1996, and
1997, 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 Cougar Engine Additives
Powertrax – Grip LS Traction System (Part No.LS109031)
from
$451.99
For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!
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Powertrax – Grip LOK Traction System (Part No.LK109028)
from
$668.99
For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!
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Powertrax – Differential Lock Assembly (Part No.1830-LR)
from
$444.99
For vehicles that are driven daily, the Power Trax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds.
Product Features:
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Product Features:
- The Power Trax Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Power Trax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
- Power Trax lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
- Power Trax offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.
- Power Trax ia an Extreme Traction System
Richmond Gear – Differential Spool (Part No.81-0931-1)
from
$272.99
Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND!
Product Features:
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Product Features:
- For over 80-years, the Richmond Double-Diamond logo has represented some of the highest quality gears in the racing industry. Winners Run Richmond!
- The superior quality of Richmond gearsets is a result of outstanding design, world class manufacturing and an extensive testing process that is performed on all products.
- Richmond performance gearsets have been winners for decades at: NHRA, NMRA, NMCA, Daytona 500, WISSOTA and U.S. Nationals.
- Richmond Gear is a leading manufacturer of high performance ring and pinion gearsets and drivetrain components, backed by a two year warranty.
- Engineered to perform faster and be more reliable, Richmond performance drivetrain products are the result of a continuous research and development program combined with state-of-the-art manufacturing capabilities.
Richmond Gear – Differential Spool (Part No.81-0928-1)
from
$259.99
Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND!
Product Features:
See More
Product Features:
- For over 80-years, the Richmond Double-Diamond logo has represented some of the highest quality gears in the racing industry. Winners Run Richmond!
- The superior quality of Richmond gearsets is a result of outstanding design, world class manufacturing and an extensive testing process that is performed on all products.
- Richmond performance gearsets have been winners for decades at: NHRA, NMRA, NMCA, Daytona 500, WISSOTA and U.S. Nationals.
- Richmond Gear is a leading manufacturer of high performance ring and pinion gearsets and drivetrain components, backed by a two year warranty.
- Engineered to perform faster and be more reliable, Richmond performance drivetrain products are the result of a continuous research and development program combined with state-of-the-art manufacturing capabilities.
Popular 1978 Mercury Cougar Engine Additives Categories
Most Popular Posi Units and Components for 1978 Mercury Cougars
Enhance your 1978 Mercury Cougar with one of the 3 Posi Units and Components we have in stock, starting at just $444.99.
Powertrax – Differential Lock Assembly (Part No.1830-LR)
from
$444.99
For vehicles that are driven daily, the Power Trax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds.
Product Features:
See More
Product Features:
- The Power Trax Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Power Trax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
- Power Trax lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
- Power Trax offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.
- Power Trax ia an Extreme Traction System
Powertrax – Grip LOK Traction System (Part No.LK109028)
from
$668.99
For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!
See More
Powertrax – Grip LS Traction System (Part No.LS109031)
from
$451.99
For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!
See More
Top-Rated Engine Additive Brands For Your 1978 Mercury Cougar
When it comes to finding the perfect Engine Additive for your 1978 Mercury Cougar, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 1 trusted brands. We carry the most popular Engine Additive brands including Powertrax, and more, all known for their exceptional customer ratings (average brand rating of 5.0 stars) and competitive prices, as low as $444.99. Purchasing a Engine Additive from us here at Advance Auto Parts is a smart move for both you and your 1978 Mercury Cougar, providing peace of mind with parts that meet or exceed OEM standards.
Popular Powertrax 1978 Mercury Cougar Engine Additives
If you’re looking for a top-quality Engine Additive for your 1978 Mercury Cougar, Advance Auto Parts has exactly what you need with our selection of Powertrax Engine Additives. We have 1 Powertrax Engine Additives in stock for this fitment, all known for their durability and precision fit. With prices starting at just $444.99, you’ll find the perfect Engine Additive for your needs and budget. Powertrax Engine Additives for the 1978 Mercury Cougar come highly rated, with over 1 customer reviews and an impressive average rating of 5.0 stars. Choosing a Powertrax Engine Additive from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
FAQs for 1978 Mercury Cougar Engine Additives
What are the best-selling Engine Additives for 1978 Mercury Cougars?
Out of 3 Engine Additives that fit 1978 Mercury Cougars, the following parts are the top sellers:
- Grip LOK Traction System (11470449) – $668.99
- Grip LS Traction System (11470400) – $451.99
What’s the price range for 1978 Mercury Cougar Engine Additives?
The prices of Engine Additives for the 1978 Mercury Cougar range from $444.99 up to $668.99 for the most premium parts.
What is the average price of an Engine Additive for a 1978 Mercury Cougar?
The average price for Engine Additives for the 1978 Mercury Cougar is $521.99. 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 Cougar model years?
What are the cheapest Engine Additives for my 1978 Mercury Cougar?
The cheapest 1978 Mercury Cougar Engine Additives we carry are:
- Differential Lock Assembly (10461152) – $444.99
- Grip LS Traction System (11470400) – $451.99
- Grip LOK Traction System (11470449) – $668.99
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 Grand Marquis Engine Additives, 1978 Zephyr Engine Additives, 1978 Marquis Engine Additives, 1978 Monarch Engine Additives, and 1978 Bobcat Engine Additives.
What are the top-rated Engine Additives that fit the 1978 Mercury Cougar?
The one 1978 Mercury Cougar Engine Additive we have in stock is the Differential Lock Assembly. It is rated 5 stars and costs $444.99.
What types of Engine Additives do you sell for my 1978 Mercury Cougar?
We currently have just 1 Engine Additive in stock for a 1978 Mercury Cougar, and as of 6/2/26, it is a Posi Units and Component.
Can I get help with 1978 Mercury Cougar 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 Cougar Engine Additives?
Advance Auto Parts keeps returns simple. For new Mercury Cougar Engine Additives and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.