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MERCURY GRAND MARQUIS Parts and Accessories

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Results 1 - 24 of 42

On Sale

SCT X4 Power Flash Programmers

SCT X4 Power Flash programmers arrive to you pre-loaded with dyno-proven tune files for select vehicles, to unlock your vehicle's hidden potential! Programming your vehicle with one of SCT's pre-loaded tune files is as easy as 1-2-3. Simply plug the OBD-II connector into vehicle's OBD-II port, select the pre-loaded tune files using the simple to navigate menu and in minutes the X4 programs your vehicle for your particular driving style. Additional features and facts about SCT X4 Power Flash programmers include: * Stores up to 10 custom tune files * Full color LCD display * High-speed data logging/monitoring * Reads/clears DTC trouble codes * Dual analog inputs * Most popular vehicles supported * Installs quickly and easily * Easy restoration back to stock * User adjustable vehicle parameters * USB Interface cable included

4.04 out of 5 stars ( 97 )

$399.00


$349.00

On Sale

Summit Racing™ Premium EFI Intake Manifolds

Stock intake manifolds in electronic fuel injection vehicles often fall short of lasting for the life of the vehicle. Being molded from polymers they tend to warp or crack and start leaking vacuum or coolant over the years. Summit Racing™ Premium EFI intakes are just what you need when it's time to replace your manifold as our design improvements address the failures that occur with existing manifolds for this application on the market today. These units are made to fit your specific vehicle and come complete with the necessary hardware for an easy OE type installation. Make this the last manifold you ever buy for your car or truck. Check out these features and benefits below: • Made in USA by OE Tier 1 Supplier • Aluminum crossover design improvement to mount direct to the cylinder head eliminating coolant exposure and eventual failure at the plastic interface of existing manifolds on the market. • High grade coolant resistant material used in coolant fitting and block out locations to coolant system. All coolant exposure areas are addressed with appropriate material. • Heat staked inserts for coil mounting. • Includes alternator brackets, throttle body adapter (application specific), thermostat, gaskets or O-ring seals, and mounting hardware.

4.53 out of 5 stars ( 49 )

$204.99


$199.99

On Sale

TCI StreetFighter Transmissions

TCI StreetFighter transmissions are durable enough to withstand the rigors of even the toughest street machines. Equipped with a manual/automatic valve body, most units allow you to manually shift the vehicle into each gear change or, by placing it in the drive position, remain fully automatic. In either mode, you get a race track shift that bangs through the gears and shaves time off of your ETs. When you use the manual gear selection feature, the StreetFighters upshift and downshift right when you move the lever, with no lag or governor override. When you select the normal drive position, they retain positive automatic shifts for the ease of driving you look for in an automatic transmission.

3.56 out of 5 stars ( 144 )

$3,375.95


$2,875.95

On Sale

Mr. Gasket High Performance Thermostats

Mr. Gasket high-performance thermostats are designed to resist large variations in coolant pressures that can occur at high rpms. Under these conditions, coolant temperature and pressure fight for control of the thermostat, keeping it from opening at its designed temperature. These balanced high-performance thermostats have brass-and-copper construction, and open at the right temperature regardless of engine rpm.

3.98 out of 5 stars ( 235 )

$29.11


$21.83

On Sale

SCT Livewire TS Plus Performance Programmer and Monitors

SCT Livewire TS performance programmer and monitors let you tap your ride's hidden performance and excitement! SCT Livewire plus touch screens are easy to set-up, use, and navigate to quickly upgrade your boring factory-calibrated vehicle computer for a high performance driving experience. These tuner kits are available for both gas and diesel vehicles plus they include a windshield mount to keep your data at eye level. You're not like everyone else and your driving experience doesn't need to be mediocre! Power tune with SCT Livewire TS Plus performance programmer and monitors. SCT Livewire TS Plus features: * Color 4 in. touch screen display * Rear view camera input * Automatic on/off/sleep mode * Holds up to 10 custom tunes * Reads and clears DTC codes * Built-in performance calculator * High-speed data logging and monitoring * User adjustable tune options * User selectable graphics and gauge layouts * User adjustable warnings/alerts * Adjust for different size fuel injectors * Disable CMCV to prevent CEL * Remove, increase, or decrease vehicle's speed limiter * Increase or decrease idle speed * Disable traction control * Add or remove timing by rpm range * Add or remove fuel at wide open throttle * Change transmission shift pressure - automatic transmissions only * Set gear ratio to correct shift patterns and vehicle's speedometer * Set tire size to correct shift patterns and vehicle's speedometer * Stores vehicle's stock file before programming * Supports and holds custom tunes * Adjust electric fan engagement temperature Custom Tune File Adjustable Options: * Increase or decrease idle speed * Remove, increase, or decrease vehicle's rpm limiter in Drive * Remove, increase, or decrease vehicle's rpm limiter in Neutral * Remove, increase, or decrease vehicle's speed limiter * Adjust electric fan engagement temperature * Add or remove fuel at wide open throttle * Set gear ratio to correct shift patterns and vehicle's speedometer * Set tire size to correct shift patterns and vehicle's speedometer * Increase or decrease the wide open throttle shift points of each gear individually * Change transmission shift pressure - automatic transmissions only

4.13 out of 5 stars ( 52 )

$599.00


$539.10

On Sale

SCT Blank Dropship-Only Computer Modules

SCT Performance blank dropship-only computer modules are shipped to you blank, so that your custom tuning provider can install the programming you need for your engine.

5.0 out of 5 stars ( 2 )

$220.00


$169.99

On Sale

ACCEL SuperStock 4000 Series Spark Plug Wire Sets

ACCEL SuperStock 4000 Series spark plug wire sets will upgrade your OE ignition system for high-spark delivery levels and RFI suppression. They extrude the silicone jacket over a tightly woven, rugged fiberglass braid that meets or exceeds OE specifications. ACCEL offers their SuperStock 4000 Series wire sets in various color schemes to match nearly any application! More product features include: * Jackets rated up to 450 degrees F * 7mm or 8mm yellow, red, black, and blue silicone jackets * Orange and other color-matched spark plug boots with terminals * Available for pre and post-HEI vehicles * Custom-fit, universal, and import

4.55 out of 5 stars ( 132 )

$68.99


$51.74

On Sale

ACCEL 300+ Ferro-Spiral Race Wire Sets

ACCEL 300+ Ferro-spiral race wire sets are custom tailored for race engines and their builders. The oversize wire will stand up to extreme heat and voltage. Their outer layers also resist heat, along with chemicals and moisture, while the high-density insulation eliminates arcing. Leave the competition behind when you order the ACCEL 300+ Ferro-spiral race wire set designed for your application.

5.0 out of 5 stars ( 1 )

$176.95


$115.95

On Sale

ACCEL Super Coils

ACCEL Super Coils are engineered for a faster rise time and a longer spark duration. They produce higher spark energy for increased performance. These coils are available for a wide variety of specific engine applications. Order the set designed for your make and model.

4.53 out of 5 stars ( 802 )

$27.13

$326.95


$20.35

$142.95

On Sale

Holley Mechanical Fuel Pumps

Holley Street Performance mechanical fuel pumps are designed to work with stock or mildly modified engines. Ranging in performance styles of 80 to 225 gph, their body castings can be rotated 360 degrees to ease mounting in difficult places and they have large orifices for high flow rates. These pumps are not compatible with methanol or alcohol fuels and should not be used with fuel injection systems. A fuel pressure regulator is required for 130 gph versions.

3.85 out of 5 stars ( 351 )

$230.95


$150.95

On Sale

ACCEL SuperStock Ignition Coils

ACCEL SuperStock coils are excellent high-performance coils. They're designed with optimized low resistance and a high turns ratio, for higher energy output. This also results in quicker starts, improved throttle response, and more high-rpm power.

4.86 out of 5 stars ( 92 )

$65.89


$49.42

On Sale

ACCEL Ford EEC-IV Super Coils

ACCEL Ford EEC-IV Super Coils offer increased throttle response, idle quality, and starting. Their E-core design maximizes energy and voltage output. ACCEL Ford EEC-IV Super Coils are direct bolt-in and plug-in replacements for use with computerized ignitions and Ford TFI distributors. They'll get you the spark you need and the performance you want.

4.56 out of 5 stars ( 25 )

$84.85


$63.64

On Sale

Mr. Gasket Chrome Fuel Pump Block-Off Plates

These fuel pump block-off plates cover the opening left when you convert from a mechanical to an electric fuel pump. They're made from precision-cut steel that's highly polished and chrome plated. Gaskets are included.

4.64 out of 5 stars ( 28 )

$18.86


$12.26

On Sale

Mr. Gasket Aluminum Layered Exhaust Gaskets

Mr. Gasket aluminum layered exhaust gaskets are reusable header or manifold seals that conform to surface irregularities and warped flanges. They will not shrink, deteriorate, or blow out. They're available for a wide variety of port styles and sizes. Features include: * Manufactured from 0.125 in. "dead soft" aluminum layers * Compresses to .060 in. to create a tight, leak-proof seal * Can withstand intense exhaust heat * Resists deterioration * Easy removal * For high performance street, drag race, road racing, and oval track use

4.37 out of 5 stars ( 60 )

$42.73


$27.77

On Sale

Hays Billet Steel Flywheels

Hays steel flywheels are engineered to handle extreme-duty applications and designed to take the punishment of today's high-horsepower engines. They are CAD-engineered and precision CNC-machined to strict tolerances. Available in weights up to 50 lbs. for specialized applications, most Hays flywheels are drilled with both the Borg and Beck and Long-style clutch patterns. Upgrade to a precision-machined and engineered Hays billet steel flywheel. Features include: * SFI-approved--legal for use in racing classes that require SFI certification * CNC-machined from certified billet steel for maximum strength and durability * CAD-designed for optimum performance and reliability * Offered in internal, external, or neutral (zero) balanced versions * Available for a wide variety of engines Note: When choosing a flywheel, remember that a heavier flywheel stores more energy. A heavy car requires more power (or inertia) to launch without bogging the engine and needs a heavier flywheel. Lighter flywheels create less inertia at launch, but will accelerate faster through the gears.

4.6 out of 5 stars ( 30 )

$412.95


$227.95

On Sale

Mr. Gasket Engine Oil Dipsticks and Tubes

The lifeblood of your vehicle is lubricant—which is why Mr. Gasket engine oil dipsticks and tubes are so important. They're small, inexpensive parts that tell you if your oil supply is dangerously low. And besides the function they fulfill, these accessories look great under the hood. Made from steel or billet aluminum, the dipsticks are available in a black, polished, or chrome plated finish. Find the OE-style kit that's built to fit your specific engine application.

3.74 out of 5 stars ( 84 )

$31.48


$20.46

On Sale

MSD Ford Blaster Coil-on-Plug Ignition Coil Packs

These MSD Ford Blaster Coil-on-Plug ignition coil packs feature a patented winding design and direct bolt-in replacement. The improved spark energy and voltage of the coil packs, combined with their reliability, have made them a favorite of performance enthusiasts. They are designed as direct bolt-in replacement coils for many SOHC Ford V8 modular engines. The housing and installation are the same as the factory coils, but that is where the similarity ends. Inside the MSD coil packs, engineers used better quality materials to assemble the primary and secondary windings. The MSD Ford Blaster Coil-on-Plug ignition coil packs take the spark energy right out of the coil and put it across the plug gap to improve the combustion and output of the engine.

4.74 out of 5 stars ( 364 )

$59.25

$399.95


$38.51

$299.95

On Sale

ACCEL SuperStock 5000 Series Spark Plug Wire Sets

ACCEL SuperStock 5000 Series spark plug wire sets are available in many sizes, styles, and colors to cover most any needs and vehicles. With only 500 ohms/ft. of resistance, more ignition energy can reach the spark plug, producing a longer-lasting, hotter spark flame kernel. The result is higher performance through improved efficiency, quicker throttle response, and reduced emissions. The wires feature silicone construction and are rated for 450 to 550 degrees F (depending on the set). The wire jacket resists moisture, chemicals, and heat extremes for longer life and great looks. The fiberglass braid adds greater pull strength and terminal retention, while the stainless steel spark plug terminals provide excellent long life, electrical conductivity, and corrosion resistance. Choose your set.

4.29 out of 5 stars ( 51 )

$97.49


$73.12

On Sale

Frostbite Electric Water Pumps

Frostbite electric water pumps are a must for high performance vehicles where horsepower comes at a premium. They eliminate common issues found in traditional mechanical water pumps--parasitic horsepower loss, heavy cast housings, and impeller drag. Frostbite electric aluminum water pumps are available in black and polished finishes with offerings for popular engine platforms. When it comes to keeping your cooling system performing at peak levels, make it Frostbite! Features include: * Available with cast or billet aluminum housings * Free-up lost horsepower resulting from the use of mechanical pumps * Frostbite logo laser-etched for performance look * Ford applications available with block-off plates * Kits come complete with gaskets, wiring pigtail, and mounting hardware

3.2 out of 5 stars ( 10 )

$349.95


$192.95

On Sale

Mr. Gasket Water Necks

Mr. Gasket offers replacement water necks in a variety of styles, materials, finishes, sizes, and angles. Water necks help to hold the vehicle's thermostat in place as it opens and closes—to regulate the flow of coolant through your engine. The opening in the water neck created by the thermostat allows coolant to flow from the radiator back to the engine. Order the model recommended for your vehicle.

3.69 out of 5 stars ( 113 )

$34.72


$22.57

On Sale

K&N Washable Lifetime Performance Air Filters

K&N washable lifetime performance air filters are designed to increase horsepower and acceleration while providing excellent filtration. K&N makes over 1,400 different replacement air filters for virtually every vehicle on the road. These filters are washable and reusable--and are custom-designed to fit into your existing factory air box. Their drop-in design means that adding performance is simple. With most vehicles, you simply remove the disposable air filter and replace it with one of these K&N air filters. Find the model designed for your specific vehicle application.

4.8 out of 5 stars ( 1139 )

$57.99

$104.99


$46.39

$83.99

On Sale

SCT X4 OBD II Cables

SCT X4 OBD II cables will keep you connected to your vehicle. The cable that came with your X4 is missing, or maybe it's damaged. No problem--SCT has HDMI/OBD II replacements that will once again allow you to easily and quickly install your X4 to the port on your vehicle. Power up your device with genuine SCT Performance X4 OBD II cables.

Not Yet Reviewed

$28.99


$26.09

On Sale

ACCEL Distributor Cap and Rotor Kits

ACCEL performance distributor cap and rotor kits offer superior protection from damaging misfires. High-output racing ignition systems place severe demands on these components, and that's why ACCEL makes sure these kits provide optimal shielding against damage. The ACCEL performance distributor cap and rotor kit designed for your application will defend your parts against high voltage, surges of spark current, and high temperatures, all of which can liquify run-of-the-mill cap and rotor's molded parts! More product features include: * High-quality compound caps ensure stability * Corrosion-resistant inserts help provide high-sparking energy flow

4.39 out of 5 stars ( 70 )

$53.09


$29.20

On Sale

ACCEL C-Cut Performance Spark Plugs

ACCEL C-Cut Performance spark plugs ignite a better path to high performance for both street and strip applications. Their ground strap aligns with the centerline of the electrode to create a much-improved electrical pathway. This design reduces quenching, shrouding, and obstruction, allowing a hotter, larger flame, better firing energy, and a complete burn. Unshroud the spark to ignite your vehicle's performance; order the ACCEL C-Cut Performance spark plugs designed to fit your engine. More product features include: * Greater fuel efficiency, reduced emissions, increased performance, and better throttle response * Helps eliminate misfiring, rough idle, and overall poor performance * Copper core outperforms iridium and platinum * Machine-rolled threads protect your valuable cylinder heads * Sizes and sets available for thousands of applications

4.54 out of 5 stars ( 392 )

$165.95


$91.95

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