Summit Racing SpeedCard - learn how to get 15% back up to $150

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MERCURY GRAND MARQUIS Parts and Accessories

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Results 1 - 24 of 179

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Optima RedTop Starting 12-Volt Batteries

Optima RedTop Starting 12-volt batteries are the ultimate power source for cars, trucks, SUVs, hot rods, and other high-performance vehicles. They're engineered with unique Spiralcell technology, delivering a stronger burst of ignition power, while extending the battery life up to three times longer than conventional models. Maintenance-free RedTop AGM batteries are sealed, leak-proof, and resistant to vibrations—so you can mount them anywhere and in virtually any position on your vehicle. Order the Optima battery designed for your application, and expect a perfect start every time.

4.81 out of 5 stars ( 1523 )

$279.99

$309.99

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Optima YellowTop Deep-Cycle 12-Volt Batteries

Optima YellowTop Deep-Cycle 12-volt batteries are high-performance, dual-purpose power sources. They're great for applications requiring repetitive amperage drain and quick recharging—like trucks with winches, commercial or public safety fleets, and vehicles loaded with electronics and accessories. YellowTops also power forklifts, tractors, and other heavy equipment. The maintenance-free AGM batteries deliver premium ignition starts, while sustaining high power levels even when system loads exceed the alternator output. Optima deep-cycle models are sealed, spill-proof, and can be mounted in most any position. They are far more resistant to vibrations than standard batteries, and will perform up to three times longer. For consistent power and faster recharges, order the YellowTop designed for your needs.

4.81 out of 5 stars ( 414 )

$299.99

$379.99

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Eaton Detroit Truetrac Differentials

Eaton Detroit Truetrac differentials use a patented design of parallel-axis planetary helix gears to provide a quiet, automatic splitting of torque. They perform like a limited-slip differential under normal driving conditions, automatically transferring torque to the wheel with better traction when ground conditions warrant. These replacement units are available for dozens of axle applications.

4.78 out of 5 stars ( 501 )

$664.99

$744.99

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ACDelco Conventional Resistor Spark Plugs

ACDelco conventional resistor spark plugs feature a design for reliability and efficient performance. These economical replacements remain ideal for many vehicles and marine applications. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance every time. The spark plugs are available in a variety of sizes and other options for universal and application-specific fitment. Order the model recommended for your vehicle.

4.81 out of 5 stars ( 263 )

$2.99

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Fel-Pro Engine Gasket Kits

Fel-Pro engine gasket kits include the seals needed for a complete rebuild, all in one convenient and affordable package. Each kit features the premium-quality gaskets required for your specific engine—from head, intake, and exhaust gaskets … to valve cover, fuel and water pump gaskets, and many more. These sets are available for thousands of vehicle applications. Match your year/make/model to the Fel-Pro engine gasket kit designed for precise fitment.

4.65 out of 5 stars ( 548 )

$59.99

$210.99

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Fel-Pro PermaTorque Head Gaskets

Fel-Pro PermaTorque head gaskets are the industry standard for no-retorque designs available today. The torque retention is gained through premium materials comprising four distinct components--core, facing, coating, and armor--and the process used in the manufacture of the gaskets. Fel-Pro PermaTorque head gaskets have been proven to retain the highest torque retention significantly better than other brands. These composite-style gaskets compress at installation to conform to and seal minor surface imperfections, while retaining the ability to resist or recover from compression during engine operation. The result is a clamping force and a secure seal over a long period of time--without retorquing.

4.79 out of 5 stars ( 42 )

$26.99

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Fel-Pro Timing Cover Gaskets

The chain of command between a crankshaft, camshaft, and engine valves is central to your vehicle's basic movement—which is why it's so important to protect the timing belt. Fel-Pro timing cover gaskets provide a tight seal to keep contaminants out of the gear shaft area. They're offered in hundreds of single or multi-piece sets for OE-style fitment on a wide variety of cars, trucks, vans, and SUVs; gaskets for industrial use are also available. Ideal for stock replacement (not intended for racing applications), Fel-Pro gaskets are made from materials such as fiber, cork, and rubber. Choose the kit which corresponds to your year/make and engine application.

4.76 out of 5 stars ( 547 )

$10.99

$26.99

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ACDelco Air Conditioning Compressors

ACDelco air conditioning compressors are an ideal choice for a custom hot rod project or standard OEM replacement. They're available in new or cost-alternative remanufactured units for fitment on a wide range of applications. The heart of any air conditioning system is the compressor—their primary function is to compress and transfer refrigerant gas. The intake side draws in refrigerant gas from the outlet of the evaporator. Once condensed to a gas, it's then discharged to the condenser, where it can transfer the heat that is absorbed from the inside of the vehicle.

4.18 out of 5 stars ( 91 )

$232.99

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Fel-Pro Fuel Pump Gaskets

Fel-Pro offers fuel pump gaskets for thousands of applications. These economical replacements are available in a variety shapes and materials. Order the model recommended for your vehicle and engine family.

4.89 out of 5 stars ( 93 )

$3.99

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Moog Premium U-Joints

Moog Premium U-joints are precision-manufactured to exacting standards. They have forged and case-hardened alloy steel crosses and heat-treated needle bearings. Cold-formed radial bearing cups provide 360 degree lubrication distribution, while superior-quality seals, and a grease fitting in the cross body make for easy maintenance. The U-joints are available for nearly two dozen positions, in universal and vehicle-specific applications.

4.64 out of 5 stars ( 212 )

$11.99

$22.99

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ACDelco Gold Platinum Spark Plugs

ACDelco Gold platinum spark plugs are perfect for engines that run on conventional plugs, as well as newer engines that require platinum plugs. These spark plugs can provide up to 100,000 miles of service before needing replacement (service life varies with individual driving conditions.) Features: * Dual platinum tip for improved resistance to spark erosion, fouling, and corrosive combustion chamber environment * Ribless insulator that improves the plug-to-boot seal * Platinum center electrode and platinum pad that lower the ignition demand voltage and reduce possible flame kernel quenching * One-piece integral suppressor seal that helps reduce radio frequency interference, meters spark plug energy to help provide long electrode life, and seals against compression leakage * Maximum engine performance over time * Corrosion-resistant shell to keep up with the demands of any vehicle * Spark gap remains virtually unchanged during the life of the plug * Meets increased auto industry performance and reliability requirements * Available for most makes and models * 100,000-mile (160,000-kilometer) limited warranty

4.87 out of 5 stars ( 99 )

$7.99

$8.99

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Fel-Pro Head Gaskets

OEM replacement Fel-Pro head gaskets are ideal for stock rebuilds on street-driven cars and trucks. These seals are available in a dozen materials, with different bores, thicknesses, and compressed volumes. They're designed for precise fitment on specific engine applications. (Fel-Pro head gaskets are not intended for racing use.)

4.78 out of 5 stars ( 254 )

$24.99

$34.99

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ACDelco Type III-H Automatic Transmission Fluid

ACDelco Type III-H automatic transmission fluid is a premium quality lubricant for use in a variety of passenger cars and light trucks. It is formulated with select base oils and additives to meet the heavy demands placed on automatic transmissions, including the latest generation of electronically controlled transmissions. ACDelco Type III-H is recommended in any transmission that calls for Type III-H, Type III-G, Type II-E, Type II, or Type A fluids in all automatic transmissions built by GM that do not require DEXRON VI. It can also be used in some hydraulic and compressor systems where excellent low-temperature flow ability is required. As always, consult your owner's manual for the correct fluid requirements.

Not Yet Reviewed

$22.99

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Moog Super Strength U-Joints

Moog Super Strength U-joints are precision-manufactured to exacting standards. They have forged and case-hardened alloy steel crosses and heat-treated needle bearings. Cold-formed radial bearing cups provide 360 degree lubrication distribution, while superior-quality seals and a grease fitting make for easy maintenance. In addition, the Super Strength U-joints have an exclusive microshield coating to protect against rust and corrosion. They are available in greasable and non-greasable styles for more than a dozen positions--in universal and vehicle-specific applications.

4.58 out of 5 stars ( 226 )

$14.99

$40.99

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Fel-Pro Rear Main Seals

Fel-Pro rear main seals are ideal for stock rebuilds or street driven cars and trucks. These OEM-style replacement seals are not intended for race applications. They're available in a variety of materials and configurations for fitment on specific vehicles and engine families.

4.7 out of 5 stars ( 168 )

$15.99

$40.99

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Fel-Pro Differential Cover Gaskets

Vehicles manufactured after 1990 often have differential housings sealed with RTV silicone. Over time, extreme vehicle vibration and even rough roads can cause the RTV bead to break. If the bead breaks and the vehicle loses the axle lube, the transmission gears begin to rub and wear. That's the whining sound that you hear. Unfortunately, it's a repair that needs immediate attention. Fel-Pro offers precut differential replacement gaskets for these applications, so you won't have to worry about applying RTV and waiting for it to set up to seal. These gaskets are available in a variety of materials, thicknesses, and configurations for precise fitment on nearly 70 differential case designs. Order the model recommended for your application—and eliminate the need for messy RTV sealant.

4.75 out of 5 stars ( 227 )

$7.99

$11.99

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Fel-Pro Headbolt Kits

Fel-Pro headbolt kits contain a complete set of the highest quality headbolts and hardened washers available. They're cold-formed to ensure molecular integrity, then heat-treated prior to thread rolling and machining. Reduced-diameter bolt heads eliminate the need for valvetrain removal and facilitate cylinder head re-torquing. The bolts are available in a variety of head styles for fitment on specific vehicle and cylinder head applications.

4.52 out of 5 stars ( 217 )

$42.99

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Fel-Pro Exhaust Manifold Gaskets

Unwanted engine noise and fumes under the hood can often be traced to poor seals. Fel-Pro offers an extensive line of replacement gaskets to provide a leak-free connection between your intake and exhaust manifolds. Designed for OE-style fitment on hundreds of specific makes/models, the gaskets are crafted from top-quality materials, such as steel core laminate and compressed fiber laminate. Order the gasket configuration to match your exhaust manifold specs.

4.73 out of 5 stars ( 195 )

$12.99

$20.99

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Fel-Pro Valley Pan Gaskets

Fel-Pro offers valley pan gaskets in a variety of materials, port styles, and configurations. Order the model recommended for your vehicle and engine application.

4.69 out of 5 stars ( 139 )

$39.99

$41.99

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Fel-Pro Water Neck Gaskets

Fel-Pro water neck gaskets are available for hundreds of applications, including most engine coolant outlets and thermostat housings. These inexpensive seals are offered in a variety of materials and configurations. Avoid unwanted leaks. Order the gaskets recommended for your vehicle and engine family.

4.71 out of 5 stars ( 273 )

$1.99

$14.99

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Procar Series 1614 Seats

Procar Series 1614 seats are perfect to reinforce a traditional, classic look for your interior. They feature stylish vertical stitching, sleek lines, and side bolsters for maximum support and comfort. The adjustable bucket seats incline and recline via lever control. Each seat is built with TIG-welded steel tubing, injection-molded foam, and suspension straps for support and comfort; and sliders are included. Procar Series 1614 seats are available for the driver or passenger side, in a choice of material and colors.

3.67 out of 5 stars ( 3 )

$297.99

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Moog Coil Spring Insulators

If you're changing out your coil springs, then you'll need a set of these Moog coil spring insulators. They're manufactured from thick, durable rubber to insulate against the vibration caused by suspension travel. Available for passenger cars, trucks, or SUVs, Moog coil spring insulators are the perfect choice for your repair or restoration project.

4.65 out of 5 stars ( 95 )

$5.99

$8.99

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Fel-Pro Exhaust Pipe Flange Gaskets

Fel-Pro exhaust pipe flange gaskets are high-quality, direct fit OE replacements for your stock original. They're manufactured from a variety of quality materials, such as steel, composite, graphite, and laminate. Well-made gaskets won't burn, shrink, or leak—ensuring a superior seal! These exhaust pipe flange gaskets are available in various styles and configurations for fitment on virtually any make/model. Order the Fel-Pro gaskets that match your vehicle specs.

4.56 out of 5 stars ( 99 )

$3.99

$11.99

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Top Street Performance Alternators

Whether it is for their great looks or their reliable high-amperage output, Top Street Performance alternators are great additions to your engine. TSP's alternators produce amperage outputs significantly above stock and are perfect for vehicles with a lot of accessories and equipment. These internally regulated units are available in serpentine or V-belt pulley styles with black or chrome finishes to complement your engine compartment.

4.5 out of 5 stars ( 26 )

$178.32

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