1978 Mercury Grand Marquis Performance Ignition Systems

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    • (1 review)
      # 803895903
      Mercury Grand Marquis 1978, PlasmaCore™ Inconel Electrode Pulse Nickel Spark Plugs by Pulstar®. With Resistor. Inconel-electrode Pulse Plugs. Designed specifically for most popular vehicles, PlasmaCore™ Inconel Electrode Pulse Plug...
      Increased horsepowerBetter torque
      $14.95 - $119.60
    • (0 reviews)
      # mpn2286087
      Mercury Grand Marquis 1978, Front Super Coil by Accel®. Accel Super Coils feature advanced bobbin technology, highly specialized silicone magnetic steel cores, along with optimized winding, resistance and turns ratios to deliver 10-15...
      Comes With Ballast ResistorEffective Up To 6500 RPM
      $69.95
    • (0 reviews)
      # mpn2268061
      Mercury Grand Marquis 5.8L / 7.5L 1978 Spark Plug Wire Set by Accel®. With Male Tower Distributor Cap. These Accel 8.8mm wires feature a carbon/graphite core that virtually eliminate RFI noise while providing maximum conductivity for...
      500 Ohms/ft. Of Resistance550 F Rated Silicone Jacket
      $88.70
    • (0 reviews)
      # mpn1177915433
      Mercury Grand Marquis 1978, Performance Nickel Spark Plug by Nitrode®. Hotter Plug, higher heat range. The Nitrode™ spark plugs are positioned to be the world's "greenest" most environmentally friendly spark plugs on the planet....
      The Nitrode™ is made with a proprietary ceramic exclusively used for this spark plugThis unique ceramic is over 10% harder than any ceramic known today
      $8.09
    • (0 reviews)
      # 906278042
      Mercury Grand Marquis 1978 Super Conductor Spark Plug Wire Set by MSD®. Designed utilizing the latest technology, this product by MSD features premium quality and will perform better than advertised. Perfect for your vehicle and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $97.47 - $105.95
    • (0 reviews)
      # 826494195
      Mercury Grand Marquis 1978, HEI Distributor by Speed FX®. With Ignition Control Module, Magnetic Trigger, Vacuum Advance, Chromoly Steel Gear, Polished Billet Aluminum Shaft, With HEI/Male Posts. Designed with expert craftsmanship this...
      Provides effective power supply to each spark plugDesigned to strict quality standards
      $98.91 - $141.05
    • (0 reviews)
      # 803882361
      Mercury Grand Marquis 6.6L / 7.5L 1978, U-Groove™ High Performance Copper Spark Plugs by Accel®. With Resistor. Accel HP Spark Plugs are made with a Copper core which is a better conductor than Platinum and Iridium. They deliver a...
      The Copper core is a better conductor than Iridium or Platinum plugsCopper dissipates heat much better than other materials
      $3.38 - $26.25
    • (0 reviews)
      # 826553028
      Mercury Grand Marquis 5.8L 1978, Flame-Thrower™ Automotive Billet Distributor by PerTronix®. Plug n' Play billet distributors are designed for maximum ignition performance at a price you can afford. The distributors are available with...
      Limited 1 year mechanicalDigital performance solutions give you more power and more features in a smaller package
      $272.40 - $306.45
    • (0 reviews)
      # mpn2293517
      Mercury Grand Marquis 1978, Front Super Stock Breakerless Ignition Coil by Accel®. Excellent high performance coil for vehicles that have been converted from points to a breakerless electronic distributor or electronic ignition system,...
      Optimized Low ResistanceHigh Energy Output
      $42.95
    • (0 reviews)
      # 960733676
      Mercury Grand Marquis 1978 Street Thunder™ Ignition Wire Set by Taylor Cable®. Get great performance at an extremely affordable price with Taylor’s Street Thunder ignition wires. These 8mm wires deliver all of the performance in...
      Low-resistance Kevlar helically spiral wound core conductor500 ohms resistance for EMI and RFI suppression
      $40.47 - $43.87
    • (0 reviews)
      # 826499828
      Mercury Grand Marquis 5.8L 1978, Power Pack Ignition Kit by TSP®. TSP's Power Pack Ignition Kit delivers high quality ignition components, all in one retail-friendly display box. It includes Pro Series Pro Billet distributor, 50,000...
      Designed for ultra high efficiencyProvides better performance
      $340.98
    • (0 reviews)
      # mpn1682284
      Mercury Grand Marquis 5.8L 1978, Powerfire™ Distributor by Professional Products®. Designed with expert craftsmanship this first-rate distributor provides effective power supply to each individual spark plug. Made from first-rate...
      Precision Made DistributorKnob Provides Precise Timing Setting
      $150.58
    • (0 reviews)
      # mpn2270622
      Mercury Grand Marquis 1978, U-Groove™ Resistor Header Copper Spark Plugs by Accel®. Designed utilizing the latest technology, this product by Accel features premium quality and will perform better than advertised. Perfect for your...
      Shorty Spark Plugs For Tubular Exhaust HeadersEliminates Dimpling Headers For Added Clearance
      $32.43
    • (0 reviews)
      # mpn2046356390
      Mercury Grand Marquis 1978, Copper Spark Plug by Autolite®. With Resistor. Modified. OE Style. These spark plugs by Autolite are specially designed and manufactured to ensure quick starts, dependable performance, and smooth...
      Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof)Multi-rib insulator reduces danger of "flash-over"
      $1.64
    • (0 reviews)
      # 898225167
      Mercury Grand Marquis 1978, Premium Racing LGS Spark Plug by Brisk®. Brisk Premium LGS spark plug has been developed after two-year cooperation with Lamborghini Morori Marini. Brisk Premium LGS spark plug utilizes extremely long...
      High-Potential Semi-Surface discharge equals more powerDischarge at the point of richest mixture in 360° perimeter
      $13.99
    • (0 reviews)
      # mpn2272653
      Mercury Grand Marquis 5.8L 1978 300+™ Spark Plug Race Wire Set by Accel®. With Male Tower Or Point Style Distributor Cap. These Accel 300+ wire sets are custom tailored for race engines and their builders. The oversize 8.8mm wire is...
      150 Ohms/ft. Of Resistance600 F Rated Silicone Jacket
      $105.95
    • (0 reviews)
      # mpn1588771648
      Mercury Grand Marquis 5.8L / 7.5L 1978 Armor Shield Spark Plug Wire Set by Accel®. With Male Tower Distributor Cap. Accel Armor Shield wires feature a metallic braided wire that delivers maximum spark energy while providing a Pro Street...
      8mm, 450°F-ratedPro-street applications
      $86.54
    • (0 reviews)
      # 819585953
      Mercury Grand Marquis 1978 Prestolite ProConnect™ Spark Plug Wire Set by Accel®. ProConnect ignition wire sets meet or exceed OE/OES specifications, performance and quality. These cables match the original color and are designed to...
      Carbon impregnated fiberglass coreFiberglass braid for added strength
      $39.68 - $45.03
    • (0 reviews)
      # 371796152
      Mercury Grand Marquis 1978 Super Stock™ Spark Plug Wire Set by Accel®. These Accel Super Stock wire sets are a true performance upgrade replacement for OE types. Efficient delivery of spark energy for a good price. Silicone boots with...
      7mm and 8mm, 550°F-ratedStreet-driven applications
      +1
      $41.09 - $60.56
    • (0 reviews)
      # 906223959
      Mercury Grand Marquis 1978 Street-Fire™ Spark Plug Wire Set by MSD®. Designed utilizing the latest technology, this product by MSD features premium quality and will perform better than advertised. Perfect for your vehicle and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $41.74 - $48.17
    • (0 reviews)
      # 199918324
      Mercury Grand Marquis 1978 409 Pro Race™ Ignition Wire Set by Taylor Cable®. Taylor’s biggest ignition wire is custom sets designed to fit muscle cars, performance cars, sports, compacts and truck applications. The .409-inch/10.4mm...
      Double spring locking terminal100% pure silicone 10.4 mm outer jacket
      $129.17
    • (0 reviews)
      # 87806455
      Mercury Grand Marquis 1978 ThunderVolt 5™ Ignition Wire Set by Taylor Cable®. DYNO-Tested and Track Proven to provide 5 HP and 7 lbs. torque more than the competition, ThunderVolt 50 ignition wires provide the ultimate in spark...
      10.4mm diameter40 Ohms/ft.
      $145.14
    • (0 reviews)
      # 906151805
      Mercury Grand Marquis 5.8L / 6.6L 1978 ThunderVolt™ Performance Performance Ignition Wire Set by Taylor Cable®. Gain horsepower and torque with Taylor’s Dyno-proven ThunderVolt racing plug wire sets. Low resistance for healthy spark...
      Exclusive copper/nickel alloy bonded by a conductive acrylic coverFerrite spiral-wound core provides low resistance for optimum RFI and RMI suppression
      +2
      $69.23 - $71.42
    • (0 reviews)
      # mpn1453210670
      Mercury Grand Marquis 7.5L With Ford Big Block Engine 1978 Ultra 40™ Wire Set by Moroso®. With this quality part backed by a great price, you can enjoy your vehicle so much more than you thought was possible. This Moroso part is...
      Cost-effective version of our race proven Ultra 40 Race Wire, without heat sleeving8.65mm diameter wire with 40 ohms of resistance per foot
      $106.21
    • (0 reviews)
      # 960840652
      Mercury Grand Marquis 1978 8.5 Series 50 Race™ Spark Plug Wire Set by AFIS®. Developed for high performance street cars and racing cars, AFIS has introduced a comprehensive new range of spiral-core ignition wire sets that contribute...
      Superior jackets resist dielectric failureBoth reactive layer and inductive windings can transmit current without interference
      $79.95
    • (0 reviews)
      # 904795374
      Mercury Grand Marquis 1978, Super Stock™ Front Super Stock Ignition Coil by Accel®. Accel's Super Stock coils are high-performance replacements for OE canister style coils. Improves starting, idle, throttle response and top RPM power....
      Effective To 6500 RPM
      $28.34 - $32.54
    • (0 reviews)
      # 826598687
      Mercury Grand Marquis 5.8L 1978, HEI Distributor by TSP®. With Coil. TSP's HEI Distributor has everything you need, all under one cap. With a high-quality aluminum housing and hardened steel dual bushing construction, it is built to...
      Designed for ultra high efficiencyProvides better performance
      +2
      $51.22 - $54.88
    • (0 reviews)
      # 826576166
      Mercury Grand Marquis 5.8L 1978, Pro Series Pro-Billet™ Distributor by TSP®. W/O Coil. TSP's Pro Series Pro Billet Distributor is for the racer who needs added spark and precision for their high performance power plant. It features a...
      Designed for ultra high efficiencyProvides better performance
      $109.76
    • (0 reviews)
      # 826426297
      Mercury Grand Marquis 5.8L 1978, Pro Series™ Ready To Run Distributor by TSP®. W/O Coil. TSP's Pro Series Ready to Run Distributor is perfect for a street performance ignition upgrade. It features a CNC-machined billet aluminum body...
      Designed for ultra high efficiencyProvides better performance
      $124.39
    • (0 reviews)
      # 826478115
      Mercury Grand Marquis 5.8L 1978, Pro-Billet™ Distributor by TSP®. W/O Coil. TSP's Pro Billet distributor is designed to get the job done. They say there is beauty in simplicity - well, this small-cap distributor has it in spades....
      Designed for ultra high efficiencyProvides better performance
      $53.35 - $54.88
    • (0 reviews)
      # 826501284
      Mercury Grand Marquis 5.8L 1978, Ready To Run Distributor by TSP®. W/O Coil. TSP's Ready to Run distributor is designed for easy installation. With the included ignition module, all you'll need to complete your set-up is a coil. Using...
      Designed for ultra high efficiencyProvides better performance
      $53.35 - $54.88
    • (0 reviews)
      # mpn1593900738
      Mercury Grand Marquis 5.8L With Ford Small Block Engine 1978, Vertex Distributor by Taylor Cable®. Ready to Run. This products is an OEM and Performance company that was built on its founding heritage supported by a tradition of...
      Housing Is Potted w/ A Premium Grade Epoxy EncasePrimary And Secondary Winding
      $355.15
    • (0 reviews)
      # mpn358720531
      Mercury Grand Marquis With Motorcraft Distributor 1978, Ignitor II™ Adaptive Dwell Ignition Control by PerTronix®. The has many of the same great features that the Ignitor has, but it's smarter. units sense the coil current level and...
      Adaptive dwell maintains peak energy throughout the entire RPM range, reducing misfires while improving engine performanceDevelops on average 4 times more available energy between 3000 and 5000 RPM, and 2 times more available plug voltage
      $150.08
    • (0 reviews)
      # mpn4254003326
      Mercury Grand Marquis 1978, Ignitor II™ Ignition Module by PerTronix®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet...
      Digital performance solutions give you more power and more features in a smaller packageInnovative technology for superior operation and rugged dependability under harsh conditions
      $134.84
    • (0 reviews)
      # mpn358720693
      Mercury Grand Marquis With Motorcraft Distributor 1978, Ignitor™ Electronic Ignition by PerTronix®. For over forty years, the Ignitor has proven itself in applications ranging from race cars to tractors. The Ignitor replaces breaker...
      Delivers twice the voltage to the spark plugs, increasing horsepower, fuel economy, and spark plug life2:1 improvement over "points" in current fall time for increased coil output
      $117.08
    • (0 reviews)
      # mpn358493559
      Mercury Grand Marquis 5.8L With Ford Small Block Windsor Engine 1978, DUI Racing Distributor Standart by Performance Distributors®. The Racing DUI has a 30 day warranty from date of purchase. The Racing Ford DUI (Davis Unified Ignition)...
      One-Wire HookupTwice The Firepower Of A Magneto
      $456.74
    • (0 reviews)
      # mpn474701989
      Mercury Grand Marquis 7.5L With Ford Big Block Engine 1978, Distributor by Big End Performance®. Provides reliable spark throughout the rpm range, so they’ll deliver the performance you need. This affordable distributor has many...
      High quality at an affordable priceExpertly made from premium materials
      $247.85
    • (0 reviews)
      # mpn4498739476
      Mercury Grand Marquis 6.6L / 7.5L 1978, HEI Reliability Distributor by Racing Power Company®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high...
      50,000 Volt Coil built inCNC Machined Housing
      $97.47
    • (0 reviews)
      # mpn4487680655
      Mercury Grand Marquis 6.6L With Pontiac Engine 1978, 2 EFI Ignition Control Kit by Edelbrock®. Now you can get the ultimate control of your engine when using the expanded ignition timing control feature of E-Street 2 EFI. This new...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $334.95
    • (0 reviews)
      # 826545728
      Mercury Grand Marquis China Manufactured 1978, Distributor Cap And Rotor by MSD®. Designed utilizing the latest technology, this product by MSD features premium quality and will perform better than advertised. Perfect for your vehicle...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $40.66 - $44.96
    • (0 reviews)
      # mpn1467515
      Mercury Grand Marquis China Manufactured 1978, Distributor Cap and Rotor Kit by MSD®. Designed utilizing the latest technology, this product by MSD features premium quality and will perform better than advertised. Perfect for your...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $39.59
    • (0 reviews)
      # 826475816
      Mercury Grand Marquis USA Manufactured 1978, Distributor Rotor by MSD®. Designed utilizing the latest technology, this product by MSD features premium quality and will perform better than advertised. Perfect for your vehicle and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $9.59 - $36.38
    • (0 reviews)
      # mpn1682286
      Mercury Grand Marquis With Powerfire Distributor 1978, Distributor Advance Lockout Kit by Professional Products®. Designed utilizing the latest technology, this product by Professional Products features premium quality and will perform...
      Timing Advance Lockout KitEasy installation
      $4.58
    • (0 reviews)
      # mpn1682287
      Mercury Grand Marquis 1978, Distributor Ignition Pickup by Professional Products®. Designed utilizing the latest technology, this product by Professional Products features premium quality and will perform better than advertised. Perfect...
      For Powerfire DistributorEasy installation
      $20.62
    • (0 reviews)
      # mpn1678546
      Mercury Grand Marquis 1978, Distributor O-Ring by Professional Products®. This superior ignition coil is painstakingly designed to improve spark energy and provide ultra high efficiency. Engineered with great care, it delivers the...
      Carefully engineered to increase spark energyPainstakingly designed for ultra high efficiency
      $2.30
    • (0 reviews)
      # 826592656
      Mercury Grand Marquis 6.6L / 7.5L 1978, Distributor Gear by Lunati®. Because stock cast iron gears are not compatible with steel roller camshafts, it is necessary to use bronze gears when installing such camshafts. They have a unique...
      High quality at an affordable priceExpertly made from premium materials
      $72.39
    • (0 reviews)
      # mpn2307306315
      Mercury Grand Marquis 6.6L / 7.5L 1978, Everwear™ Heat Treated Cast Distributor Gear by Lunati®. Heat Treated Cast Distributor Gears are made with a unique material that is specially nitrided to case harden the gear, providing...
      High quality at an affordable priceExpertly made from premium materials
      $72.32
    • (0 reviews)
      # 826428984
      Mercury Grand Marquis 1978, Distributor Gear by PRW®. PRW bronze distributor gears are designed to minimize wear to your high performance camshaft. These distributor gears are crafted from superior quality bronze aluminum and are...
      Easily replacedRoll pin included
      $32.85 - $39.15
    • (0 reviews)
      # 826437961
      Mercury Grand Marquis 5.8L 1978, Distributor Drive Gear by Vertex Magnetos®. Bronze distributor drive gears are generally best used on billet steel camshafts, which can be damaged by the stock iron gears. These gears are not...
      Bronze composition safe against steel billet camshafts0° or 12° advance
      $58.81 - $82.42
    • (0 reviews)
      # mpn4486063127
      Mercury Grand Marquis 1978, Professional™ Rapidfire Platinum Spark Plug by ACDelco®. Designed for today’s most popular autos, as well as several marine applications, ACDelco’s Rapidfire® Platinum Spark Plugs fit engines using...
      Ribless insulator that improves the plug-to-boot sealTapered center wire electrode with a platinum pad reduces the firing diameter and helps improve the firing efficiency by concentrating and directing energy needed to fire the plug with less voltage
      $4.16
    • (0 reviews)
      # mpn2341129
      Mercury Grand Marquis 1978, Double Platinum Spark Plug by Champion®. With platinum fine wire welded onto the nickel alloy center electrode and a platinum pad welded to the ground electrode, these products provide long-lasting service...
      Double Platinum Power - Premium Spark Plug. More Powerful Performance.Platinum center and ground electrode for greater wear resistance
      $4.66
    • (0 reviews)
      # mpn2341108
      Mercury Grand Marquis 1978, Platinum Power™ Spark Plug by Champion®. With a platinum tip welded to a nickel alloy center electrode, these spark plugs provide superior wear characteristics. Combining a thin-wire center electrode with a...
      Platinum Power- Premium Spark Plug. Powerful Performance.Platinum center electrode for long life
      $2.14
    • (0 reviews)
      # mpn1404078
      Mercury Grand Marquis 1978, Copper Spark Plug by Motorcraft®. Is your vehicle hard to start? Does it miss under load and idle rough? Is your gas mileage not what it used to be? Your ignition system may need repair, but before you waste...
      Direct OEM replacementRecommended by Ford Motor Company
      $1.55
    • (0 reviews)
      # mpn1404105
      Mercury Grand Marquis 5.8L 1978, Spark Plug Wire Set by Motorcraft®. Is your vehicle hard to start? Does it miss under load and idle rough? Is your gas mileage not what it used to be? Your ignition system may need repair, but before you...
      Direct OEM replacementMeets strict Ford Motor Company standards
      $25.60
    • (0 reviews)
      # 99006968
      Mercury Grand Marquis 1978, Pro Series™ Spark Plug Wire Set by Standard®. Designed utilizing the latest technology, this product by Standard features premium quality and will perform better than advertised. Perfect for your vehicle...
      The design of this set strictly follows the original specifications set by OEManufactured using OE-Style spark plug and distributor boots
      $14.63 - $16.10
    • (0 reviews)
      # 207456669
      Mercury Grand Marquis 1978, Spark Plug Wire Set by Standard®. Designed utilizing the latest technology, this product by Standard features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle,...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $13.48 - $29.49
    • (0 reviews)
      # mpn4254419411
      Mercury Grand Marquis with Coil Package 1978, Ignition Coil by Spectra Premium®. Spectra Premium ignition coils are designed and produced under a strict TS16949 quality control process. At CARiD you can get this superior replacement...
      All ignition coils are durability tested at 100 cycles of thermal shock (-50 to 300° F), to ensure reliability from extreme vibration24 hours salt spray test ensures sensors provide high corrosion resistance
      $7.69
    • (0 reviews)
      # mpn4252127559
      Mercury Grand Marquis with 12 Volt System 1978, Blue Streak™ Ignition Coil by Standard®. Designed utilizing the latest technology, this product by Standard features premium quality and will perform better than advertised. Perfect for...
      Standard® Blue Streak DIS ignition coils use pure copper windings in both bobbins to improve durability and provide higher resistance to internal shorts and dielectric breakdown. Standard® Blue Streak coils can run hotter without breaking down.A full E-Lam core of silicon steel and solid brass high voltage terminals protects against corrosion. Standard® Blue Streak DIS coils are built for maximum output voltage.
      $19.47
    • (0 reviews)
      # mpn4252127746
      Mercury Grand Marquis with 12 Volt System 1978, Tru-Tech™ Ignition Coil by Standard®. Designed utilizing the latest technology, this product by Standard features premium quality and will perform better than advertised. Perfect for...
      High efficiency laminations optimize magnetic field build-up to produce high spark energy and reliable performance.Standard® T-Series DIS ignition coil terminals are steel or aluminum, as indicated by OE.
      $9.29
    • (0 reviews)
      # 650451768
      Mercury Grand Marquis 1978, Remanufactured Electronic Ignition Distributor by A1 Cardone®. Without Governor, Coil Wire, Distributor Cap, Ignition Rotor, Electronic Module, Integrated Ignition Coil. Automated test equipment verifies...
      50-state emissions street legalThe finest quality at a great price
      $29.63 - $37.92




    Guides & Articles

    Useful articles fast to read and guides easy to understand written by mechanics and car enthusiasts to turn your shopping experience with CARiD into a pleasure

    • Performance Ignition Systems
      November 26, 2014
      The Benefits of a Performance Ignition Distributor
      Since their inception at the start of the 20th century, motor vehicles with gasoline burning engines have needed a precise way to deliver an electrical spark to each...
      by Timothy Zahl
    • Performance Engine Parts
      July 03, 2014
      Performing a Basic Engine Tune Up
      This article will guide you through a generic tune up on most any car or light duty gasoline-powered vehicle built within the last 20 years or so. We will presume that...
      by Timothy Zahl
    • Ignition Parts
      June 28, 2014
      Understanding The Different Types Of Spark Plugs
      Since the dawn of the automobile, spark plugs have been an integral part of gasoline engines because they conduct the electrical energy from a vehicle’s ignition...
      by Timothy Zahl
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