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MERCURY GRAND MARQUIS Parts and Accessories

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Results 1 - 24 of 50

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

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

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

King XP-Series Coated Rod Bearings

Give your engine the winning edge with King XP-Series coated rod bearings. Built off the revolutionary XP-Series tri-metal construction, King's factory-applied pMaxKote nano-composite coating takes protection to the next level without adding any additional thickness! These high performance race bearing sets are available for fitment on a wide range of specific vehicle applications. pMaxKote provides: * Superior seizure resistance * Superior cavitation resistance * Superior wear resistance * Superior protection against oil starvation

4.2 out of 5 stars ( 10 )

$152.99

$212.99


$137.69

$191.69

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 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

King XP-Series Rod Bearings

King XP-Series rod bearings feature advanced metallurgical and geometric technologies that meet extreme performance loads. They were developed for all performance applications that use forged steel aftermarket crankshafts and produce high loads for extended periods. King focuses on one product—bearings—and nothing else. Their innovative race-only Xtreme Performance Max Black Tri-Metal rod bearings have a 24 percent stronger overlay and 17 percent more fatigue strength by using a micro process called SecureBond. Built with enhanced tri-metal, King XP-Series rod bearings layer copper-lead construction with a nickel plate barrier and a lead/tin/copper Babbitt overlay over a steel backing in an adhesion process that provides superior stability and durability. King's advanced control measures hit a bull's-eye, maintaining wall thickness tolerances far tighter than their competitors—at an amazing +/- .0001 in.! XP-Series rod bearings are narrowed on the crank cheek side with increased crush height for improved bearing-to-bore contact, heat transfer, and reduced spin potential in high-rpm applications.

4.65 out of 5 stars ( 68 )

$78.99

$164.99


$71.09

$148.49

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

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 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

King XP-Series Main Bearings

Built with enhanced tri-metal, King XP-Series main bearings have a layered copper lead construction, with a nickel plate barrier and lead/tin/copper Babbitt overlay over a steel backing--in an adhesion process that provides superior stability and durability. King's advanced control measures hit a bull's-eye, maintaining wall thickness tolerances far tighter than their competitors: an amazing +/- .0001 in. The XP-Series main bearings are narrowed for large radii crankshafts and feature enlarged, chamfered oil holes with full, 3/4 in., or 1/2 in. grooving for improved oiling. They deliver consistent and reliable performance with a high-load capacity. These race-only Xtreme Performance (XP-Series) Tri-Lecular main bearings are proven track-tough to handle the ground-shaking power of your race engine. Hundreds of sets are available; order the bearings recommended for your vehicle.

4.42 out of 5 stars ( 43 )

$77.99

$213.99


$70.19

$192.59

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

King XP-Series Coated Main Bearings

Give your engine the winning edge with King XP-Series coated main bearings. Built off the revolutionary XP-Series tri-metal construction, King's factory-applied pMaxKote™ nano-composite coating takes protection to the next level without adding any additional thickness! Order the replacement main bearings designed for fitment with your engine. pMaxKote™ provides: * Superior seizure resistance * Superior cavitation resistance * Superior wear resistance * Superior protection against oil starvation

4.43 out of 5 stars ( 7 )

$121.99

$318.99


$109.79

$287.09

On Sale

King SI-Series Main Bearings

King SI-Series main bearings are recommended for OE applications. These replacement bearings are designed for aftermarket gasoline or diesel engine rebuilding—and performance engines with factory crankshafts. The bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. King SI-Series main bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow. Order the bearing set designed for fitment on your make and model.

4.16 out of 5 stars ( 80 )

$18.99

$75.99


$17.09

$68.39

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

King HP-Series Rod Bearings

King HP-Series rod bearings were developed mainly for drag race applications needing a material harder than the Babbitt top layer. These applications demanded a structure that could withstand high loads for short durations and still offer higher embeddability and compatibility. In response, King developed the HP-Series, featuring the Alecular metal structure. The HP-Series is also suited for many performance applications with nodular cast iron crankshafts, such as street, strip, and some levels of Circle Track racing. Order the set recommended for your vehicle. HP-Series bearings are particularly suitable for the following cases: * When a tri-metal bearing's Babbitt overlay extrudes over the sides, migrates to one end, or is physically removed by the crankshaft * When the intermediate layer of a tri-metal bearing is exposed, damaging the crank journal and requiring expensive grinding or replacement * When contaminants enter the oil stream, scratching and damaging the crankshaft journals

4.67 out of 5 stars ( 36 )

$82.99

$111.99


$74.69

$100.79

On Sale

King HP-Series Main Bearings

King HP-Series main bearings are recommended for street and strip performance applications. They're designed for blown, turbocharged, NOS, and alcohol-fueled engines using aftermarket crankshafts. These main bearings have greater eccentricity for superior oiling at high rpm, and a chamfered surface for large radii crankshafts. HP-Series bearings also feature large, chamfered oil holes—and are available in 1/2 grooving for improved oiling to withstand high-rpm applications. Order the bearings designed for fitment with your specific engine.

4.44 out of 5 stars ( 48 )

$72.99

$123.99


$65.69

$111.59

On Sale

VEGE Remanufactured Cylinder Heads

VEGE Remanufactured cylinder heads are a popular choice for performance and value. With its advanced and efficient production process, backed by more than eight decades of experience, VEGE is able to supply remanufactured cylinder heads with a level of quality that equals that of new OEM products—at extremely competitive prices. The rebuilt cylinder heads are carefully inspected, cleaned, and then fully machined and assembled with top-of-the-line components. Unless otherwise noted, the assemblies include a cast iron or aluminum cylinder head, intake and exhaust valves, valve springs, retainers, locks, stem seals, rocker arm studs, and more. Many heads include rocker arms. Nearly a thousand models are available, for fitment on countless applications.

3.77 out of 5 stars ( 40 )

$472.99


$422.99

On Sale

King SI-Series Rod Bearings

King SI-Series rod bearings are recommended for OE applications. They're designed for aftermarket gasoline or diesel engine rebuilding and performance engines with OE crankshafts. These direct replacements have an improved finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. King SI-Series rod bearings also feature improved oil clearance to reduce wear and increase engine life—which, in turn, lessens operating noise, vibration, and excess oil flow. Hundreds of sets are available; order the bearings recommended for your vehicle.

4.57 out of 5 stars ( 92 )

$13.99

$46.99


$12.59

$42.29

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

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

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