1977 Mercury Bobcat Engine Additives

Keep Your 1977 Mercury Bobcat 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 1977 Mercury Bobcat 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 1977 Mercury Bobcat Engine Additive at Advance Auto Parts is around $487.24, with a range that starts at $7.99 and goes up to $931.99. With 4 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like Dropout Housing Stud For Ford 8" & 9", Grip LOK Traction System, and Lock Right Locker 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 1977 Mercury Bobcat in peak condition, inside and out.

Essential 1977 Mercury Bobcat Engine Additives

Yukon Gear – Dropout Housing Stud For Ford 8" & 9" (Part No.32338)

Dropout Housing Stud For Ford 8" & 9"

from

$7.99
Product Features:
  • Housing stud
  • Fits Ford 8″ and 9″
See More

Powertrax – Lock Right Locker (Part No.1810-LR)

Lock Right Locker

from

$339.99
The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! 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!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
  • Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
  • Powertrax® 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.
  • Powertrax® = Extreme Traction Systems!
  • See More

    Yukon Gear – Grizzly Locker For Ford 8" With 28 Spline Axles (Part No.28006)

    Grizzly Locker For Ford 8" With 28 Spline Axles

    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:
    • Fits Ford 8″ with 28 spline axles
    • Patented internal design reduces common locker failures
    • 8620 internals for added strength
    • Assembled in the USA
    See More

    Powertrax – Grip LOK Traction System (Part No.LK109028)

    Grip LOK Traction System

    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

    Yukon Gear – Dura Grip For Ford 7.5" (Part No.26034)

    Dura Grip For Ford 7.5"

    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:
    • 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
    See More

    Most Popular Posi Units and Components for 1977 Mercury Bobcats

    Enhance your 1977 Mercury Bobcat with one of the 4 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)

    Dropout Housing Stud For Ford 8" & 9"

    from

    $7.99
    Product Features:
    • Housing stud
    • Fits Ford 8″ and 9″
    See More

    Yukon Gear – Grizzly Locker For Ford 8" With 28 Spline Axles (Part No.28006)

    Grizzly Locker For Ford 8" With 28 Spline Axles

    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:
    • Fits Ford 8″ with 28 spline axles
    • Patented internal design reduces common locker failures
    • 8620 internals for added strength
    • Assembled in the USA
    See More

    Powertrax – Grip LOK Traction System (Part No.LK109028)

    Grip LOK Traction System

    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 – Lock Right Locker (Part No.1810-LR)

    Lock Right Locker

    from

    $339.99
    The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! 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!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.Powertrax® 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.Powertrax® = Extreme Traction Systems!
    See More

    FAQs for 1977 Mercury Bobcat Engine Additives

    What are the best-selling Engine Additives for 1977 Mercury Bobcats?

    Out of 4 Engine Additives that fit 1977 Mercury Bobcats, the following parts are the top sellers:

    What’s the price range for 1977 Mercury Bobcat Engine Additives?

    The prices of Engine Additives for the 1977 Mercury Bobcat range from $7.99 up to $931.99 for the most premium parts.

    What is the average price of an Engine Additive for a 1977 Mercury Bobcat?

    The average price for Engine Additives for the 1977 Mercury Bobcat is $487.24. 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 Bobcat model years?

    Yes, we carry Engine Additives for 4 model years of Mercury Bobcats between 1975 and 1980. The following model years are the most popular for Engine Additive purchases: 1980, 1979, 1978, 1976, and 1975.

    What are the cheapest Engine Additives for my 1977 Mercury Bobcat?

    The cheapest 1977 Mercury Bobcat Engine Additives we carry are:

    Does Advance Auto Parts sell Engine Additives for any other 1977 Mercury models?

    Yes. We stock Engine Additives for 5 other popular 1977 Mercury models. Some of the most popular are 1977 Cougar Engine Additives, 1977 Grand Marquis Engine Additives, 1977 Capri Engine Additives, 1977 Marquis Engine Additives, and 1977 Comet Engine Additives.

    What types of Engine Additives do you sell for my 1977 Mercury Bobcat?

    We currently have just 1 Engine Additive in stock for a 1977 Mercury Bobcat, and as of 11/2/25, it is a Posi Units and Component.

    Can I get help with 1977 Mercury Bobcat 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 Bobcat Engine Additives?

    Advance Auto Parts keeps returns simple. For new Mercury Bobcat Engine Additives and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.