Mercury Comet Engine Additives

Your One-Stop Shop For Trusted Mercury Comet Engine Additives

If you’re in search of Mercury Comet Engine Additives aftermarket or OEM parts, consider your search over! Advance Auto Parts carries 7 Engine Additives from top brands with prices ranging from $17.99 to $941.99.

Beyond great prices, we stock trusted brands manufacturing all types of Engine Additives for your Mercury Comet. Of the 3 OEM and aftermarket parts brands we carry, some of the most popular are Richmond Gear, Powertrax, and Yukon Gear.

And don’t forget to read customer reviews across all Engine Additives categories in our catalog. Buy with confidence by leveraging past customer experiences of our aftermarket and OEM parts.

At Advance Auto Parts, we don’t think top quality Engine Additives have to cost top dollar, and we prove it. Browse our top Mercury Comet Engine Additives below, order online to ship to your home, or head into your nearest Advance Auto Parts location to get started.

Essential Mercury Comet Engine Additives

Powertrax – Grip PRO Traction System (Part No.GT108028)

Grip PRO Traction System

from

$537.99
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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Richmond Gear – Differential Spool (Part No.81-0931-1)

Differential Spool

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:
  • 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.
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Powertrax – Grip PRO Traction System (Part No.GT109028)

Grip PRO Traction System

from

$496.99
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 – No-Slip Traction System (Part No.9206902800)

No-Slip Traction System

from

$551.99
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!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!
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    Powertrax – Grip LS Traction System (Part No.LS109031)

    Grip LS Traction System

    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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    Yukon Gear – Grizzly Locker For Ford 8" With 31 Spline Axles (Part No.28007)

    Grizzly Locker For Ford 8" With 31 Spline Axles

    from

    $941.99
    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 31 spline axles
    • Patented internal design reduces common locker failures
    • 8620 internals for added strength
    • Assembled in the USA
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    Yukon Gear – Friction Modifier / Posi Additive (Part No.15018)

    Friction Modifier / Posi Additive

    from

    $17.99
    Help keep positraction chatter down with posi additive from Yukon Gear & Axle.

    Product Features:
    • positraction additive
    • For use in any clutch-style limited slip
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    Engine Additives Brands You Can Trust For Your Mercury Comet

    3 trusted brands of Engine Additives line our shelves, ready to help keep your Mercury Comet running smooth. Below are some of the most popular brands and their top Engine Additives offerings:

    Popular Powertrax Engine Additives

    Powertrax products for the Mercury Comet span several categories. Some of the highest-rated Powertrax Engine Additives that will fit your Mercury Comet are:
    No-Slip Traction System
    from $551.99
    (1)
    No-Slip Traction System
    Posi Units and Components

    Most Purchased Mercury Comet Engine Additives from Yukon Gear

    When you buy the most frequently purchased Yukon Gear brand Engine Additives, you can be confident it will be the right part for your Mercury Comet. Here are the Yukon Gear Engine Additives Advanced Auto customers buy the most:
    Friction Modifier / Posi Additive
    from $17.99
    This product is not rated
    Friction Modifier / Posi Additive
    Friction Modifier
    Grizzly Locker For Ford 8" With 31 Spline Axles
    from $941.99
    This product is not rated
    Grizzly Locker For Ford 8" With 31 Spline Axles
    Posi Units and Components
    Differential Spool
    from $272.99
    This product is not rated
    Differential Spool
    Posi Units and Components

    FAQs for Mercury Comet Engine Additives

    What are the most purchased Engine Additives for the Mercury Comet?

    Out of 7 Engine Additives for the Mercury Comet, the most popular in our inventory are:
    Differential Spool
    from $272.99
    This product is not rated
    Differential Spool
    Posi Units and Components
    Grip LS Traction System
    from $451.99
    This product is not rated
    Grip LS Traction System
    Posi Units and Components
    Grip PRO Traction System
    from $496.99
    This product is not rated
    Grip PRO Traction System
    Posi Units and Components