1978 Mercury Grand Marquis Performance Parts

Show items:
Sort by:
    • (0 reviews)
      # mpn359116179
      Mercury Grand Marquis 5.8L Windsor Engine with Ford Small Block Engine 1978, IMCA Modified Steel Long Tube Exhaust Headers by Schoenfeld Headers®. Primary Tubing Diameter: 1.75". Collector Length: 8". Header Coating: Painted. Header...
      Engineered to enhance your vehicle's performanceMade to stringent quality standards
      $271.78
    • (0 reviews)
      # 26755641
      Mercury Grand Marquis 1978, Drilled and Slotted Vented 1-Piece Front Brake Rotors and Hub Assembly by Chrome Brakes®. This is a set of OEM-sized replacement rotors with slots and drilled holes that provide the superior level of cooling...
      +2
      $272.83
    • (0 reviews)
      # 40509688
      Mercury Grand Marquis With Air Suspension 1978, B6 Series Driver or Passenger Side Heavy Duty Monotube Shock Absorber for Stock Height Vehicles by Bilstein®. Quantity: 1 per Pack. If you expect more damping power from your shock...
      $100.40 - $102.10
    • (0 reviews)
      # 377251762
      Mercury Grand Marquis 5.8L / 6.6L 1978, HPR™ Round Red Air Filter by Spectre Performance®. Spectre’s High Performance Replacement Air Filters are engineered to outperform ordinary paper filters by providing increased air flow for...
      High performance and high air flow filterFilter media is non-woven synthetic and pre-dyed
      $20.78
    • (0 reviews)
      # 450479564
      Universal PowerPack™ Turbocharger System by Banks®. The Banks Power Dual Exhaust PowerPack System is the complete towing package your pickup truck, with extended cab short bed configuration, deserves.
      Stunning Top GainsImproved Mileage
      $2,198.00 - $2,798.00
    • (0 reviews)
      # mpn4478773922
      Universal User Configurable LCD Dash Display by Auto Meter®. Designed specifically for the harshest of environments, the carbon composite housing is IP65 sealed against water and dust intrusion and will easily withstand 20g of...
      7.0” TFT LCD panel, 1000 nit brightness for unmatched daytime and nighttime visibility with 800x480 resolution. Onboard photo sensor for automatic brightness controlDimensions - 8.3" Wide x 5.2" High x 1.4" Deep
      $2,832.00
    • (0 reviews)
      # 1093470674
      Mercury Grand Marquis 7.5L 1978, Iron Eagle Sportsman Engine Block by Dart®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and...
      Siamesed cylinders: Standard 4.000" or 4.125" cylinders can be safely bored to 4.185" diameterMultiple deck heights allow for increased displacements of up to 468 cubic inches
      $2,606.20
    • (4 reviews)
      # 723877102
      Mercury Grand Marquis 1978, Thermocap™ Radiator Cap by Mr. Gasket®. Pressure: 16 lbs. Material: Aluminum. Keeping your engine cool is pretty important, so Mr. Gasket has a full line of cooling system accessories. Whether it’s a...
      Brilliant triple-chrome platingPrevent boilovers
      +1
      $32.43 - $37.53
    • (1 review)
      # 568077703
      Mercury Grand Marquis C6 Transmission 1978, MegaShifter™ Automatic Shifter by B&M®. You can have B&M shifter performance with the Console MegaShifter. This shifter features full ratchet action performance, a lighted gear position...
      Cable operated for quick installation and accurate shiftingReverse lockout feature meets NHRA and IHRA requirements
      $338.18 - $340.06
    • (1 review)
      # 470518243
      Mercury Grand Marquis 7.5L 1978, Street Avenger 4BBL Carburetor by Holley®. Street Avenger carburetors are known to bolt on right out of the box and have great features such as a quick change vacuum secondary for easy fine tuning;...
      Vibratory polished for good looksOptimized street calibration that works-out-of-the-box
      $443.95 - $469.95
    • (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)
      # 1160025153
      Mercury Grand Marquis 1978, Bulk Power Steering Hose by AllStar Performance®. The same quality hose included in AllStar Performance® power steering hose kits available in a variety of lengths for building custom power steering lines or...
      Designed to get maximum out of your steering systemImprove the performance of your vehicle
      $20.99 - $139.99
    • (0 reviews)
      # 985154426
      Universal Advanced Lightweight 12V AGM Battery by Braille Battery®. Battery Type: AGM. Voltage: 12V. Batteries have always presented the same problems of weight, safety, and cost. In racing, aerospace, and advanced technology...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $149.99 - $229.99
    • (0 reviews)
      # 1029107513
      Mercury Grand Marquis with 28 Spline / with 31 Spline with Ford 9" Series Axle 1978, Rear Zip Locker by Yukon Gear & Axle®. The Yukon Zip Locker is the latest in on-demand traction. Its air-operated design allows you to switch from an...
      Air operated locker provides on-demand tractionForged case & 8620 internals for added strength
      $899.22 - $959.40
    • (0 reviews)
      # 48222560
      Club X-1 Full Face ATM (Advance Thermo Material) Racing Helmet by Sparco®. Certification: ECE 05; Material: ATM (Advance Thermo Material) Designed for indoor kart racing where a fire proof helmet isn't required, this product is...
      Designed for indoor kart racingProvides ultimate protection
      $140.00
    • (0 reviews)
      # mpn359116180
      Mercury Grand Marquis 5.8L Windsor Engine with Ford Small Block Engine 1978, Stock Clip Crossover Exhaust Headers by Schoenfeld Headers®. Primary Tubing Diameter: 1.625". This top-notch product by Schoenfeld Headers is made to give that...
      Engineered to enhance your vehicle's performanceMade to stringent quality standards
      $292.18
    • (0 reviews)
      # 59068288
      Mercury Grand Marquis 1978, Sport Slotted Vented 1-Piece Brake Rotor by StopTech®. StopTech Sport Rotors - the new name for one-piece performance upgrade rotors from StopTech. Formerly known as Power Slot or SportStop rotors, StopTech...
      $73.76 - $102.15
    • (0 reviews)
      # 36083703
      Mercury Grand Marquis Hardtop 1978, Monro-Matic Plus™ Driver or Passenger Side Shock Absorber by Monroe®. Quantity: 1 per Pack. Nitrogen gas charged Monro-Matic Plus shocks and struts feature VPV (velocity proportional valving) and...
      $16.13 - $16.79
    • (0 reviews)
      # 377251738
      Mercury Grand Marquis 7.5L 1978, Oval Air Cleaner Assembly by Ford Performance®. Turn your Ford into a high-performance street and drag strip monster with top-of-the-line Ford Performance parts that will help you get the most out of it....
      Designed to help you get the most out of your vehiclePerfect for use in high-performance environments
      $129.24 - $130.71
    • (0 reviews)
      # mpn4478772999
      Universal Display Control Module Touchscreen Handheld by Fast®. 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 your...
      High quality at an affordable priceExpertly made from premium materials
      $385.70
    • (0 reviews)
      # 1093429667
      Mercury Grand Marquis 1978, Special High Performance Engine Block by Dart®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and...
      350 or 400 main journals accept commonly available crankshaftsSplayed outer bolts on middle main bearing caps prevent cracks
      $2,099.54
    • (0 reviews)
      # 262157158
      Mercury Grand Marquis 1978, 300 Series High Flow Electric Water Pump by Meziere Enterprises®. Flow Rate: 55 GPM. Performance, sophistication and durability are by no means all the benefits you'll get if you purchase this product by...
      Suitable for street or drag strip use – 3000+ hour life expectancyHigh flow design provides 55 gallons per minute free flow rating
      +2
      $451.00 - $701.56
    • (0 reviews)
      # 1136155520
      Mercury Grand Marquis C6 Transmission 1978, Pro Ratchet™ Automatic Transmission Shifter by B&M®. This is the ultimate race shifter. If you're looking for a stout shifter – designed, developed, and refined by the company that...
      Quick And Easy To OperateReverse Lockout Meets NHRA And IHRA Requirements
      $303.07 - $304.97
    • (0 reviews)
      # 63114740
      Mercury Grand Marquis 1978, Mechanical Fuel Pump by Holley®. Designed utilizing the latest technology, this product by Holley features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...
      Triple Chrome Plated HousingsTraditional Look Open Element Style
      $86.52 - $142.95
    • (0 reviews)
      # 960798688
      Mercury Grand Marquis 1978 MPG+™ Spark Plug Wires by Granatelli Motor Sports®. Granatelli O ohm wires are patent protected by United States Patent number 7,185,622. This patent covers our unique method of producing ignition wires of...
      Increases mileage 15%Direct OEM replacement, exceeds OEM specifications, OBD-II computer safe
      $129.20
    • (1 review)
      # 1090211116
      Vega Gear Box by Helix®. If you are looking to upgrade the steering system of your vehicle to make the most out of your vehicle’s performance, go with this high-grade steering part that is engineered to be second to none when it comes...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $227.99 - $731.45
    • (0 reviews)
      # 985325168
      Universal Carbon Lithium Micro Lite 12V Battery by Braille Battery®. Battery Type: Lithium. Cold Cranking Amperage: 200. Polarity: Straight. Voltage: 12V. Carbon composite casings with CNC precision cell top design contain...
      $949.99 - $1,499.99
    • (0 reviews)
      # 68627871
      Mercury Grand Marquis with Ford 8.8" Series Axle with 28 Spline 1978, Rear Axle Shaft Kit by Yukon Gear & Axle®. Yukon Gear and Axle offers an extensive line of general replacement and high performance axles for passenger car, truck and...
      Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain
      $174.74 - $174.76
    • (0 reviews)
      # 69025922
      110 Series Single Layer Racing Suit by RaceQuip®. Avaliable in Colors: Black, Blue, Red. Get superior durability and comfort combined with overall flame and heat protection. Strong construction and advanced sewing techniques make this...
      Ensures heat and fire protectionGentle fabric provides superior comfort
      $99.95 - $139.95
    • (0 reviews)
      # 381739208
      Mercury Grand Marquis 5.8L 1978, Super Competition™ Exhaust Header Gasket by Hooker®. Emissions: Racing Only. Hooker's precision-matched Super Competition header gaskets provide a sure fit and unmatched exhaust sealing. This OEM...
      Precision fit for improved sealingSteel core provides superior adhesion
      $13.47 - $14.61




    CARiD is the ultimate source for premium-quality performance parts. With our extensive collection of performance upgrades, adding onto your vehicle's performance or improving its look is safe and easy. Boost the interior of your 1978 Mercury Grand Marquis with a set of racing seats, raise or lower your vehicle for an aggressive look, or add a set of high-performance brake rotors for superior braking. Unlock the hidden potential of your 1978 Mercury Grand Marquis that has been waiting to be released!


    • Add Power to Your Jeep
      Fuel Up Your Success
    • Take Your Braking to a New Level
    • When the Best Gets Better
      The Performance & Sound to Thrill

    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 Brakes, Pads & Rotors
      August 10, 2018
      When Is It Time To Replace My Brake Lines?
      Hydraulic brake lines and hoses aren’t something most people think about when it comes to vehicle maintenance. That’s understandable, considering automakers...
      by Michael Grayen
    • Performance Brakes, Pads & Rotors
      August 09, 2018
      When Is It Time To Replace My Brake Calipers?
      Brake calipers, found only on disc brake systems, house pistons which use the force of hydraulic brake fluid to stop the vehicle. More specifically, those pistons...
      by Timothy Zahl
    • Suspension
      August 08, 2018
      When Is It Time To Replace My Vehicle's Springs?
      The springs on your vehicle are an integral part of its suspension system. Not only do springs keep all four corners suspended at a pre-determined, level ride height,...
      by Richard Reina
    • Starting & Charging
      August 03, 2018
      When Is It Time To Replace My Alternator?
      Bolted to an engine block and powered by a belt-driven pulley, an alternator is in motion whenever the engine is running. Essentially, a vehicle's battery is tasked...
      by Michael Grayen
    • Performance Suspension Parts
      July 11, 2018
      When Is It Time To Replace My Suspension Bushings?
      Maybe you remember being pushed along in a wheelbarrow during childhood. The ride was bone-jarring - even with an air-filled rubber tire cushioning against the rough...
      by Timothy Zahl
    • Engines
      May 21, 2018
      How To Remove An Engine
      If you've grown tired of your engine's declining performance, inconsistent power, rough idle, exhaust smoke, knocking noises, rattles, and other maladies that plague...
      by Richard Reina
    • Engines
      May 09, 2018
      How Does An Internal Combustion Engine Work?
      An engine that uses liquid fuel to create energy, such as an internal combustion engine, is basically a large air pump. Cool air is drawn in, mixed with the fuel of...
      by Timothy Zahl
    • Engines
      May 02, 2018
      Glossary Of Engine External Parts
      Internal combustion engines are extremely complex and feature a wide array of components that rotate, pump, pressurize, or seal. Many of these components, while...
      by Timothy Zahl
    • Performance Engine Parts
      April 20, 2018
      What You Need When Rebuilding Or Replacing An...
      So you’ve decided to take on the project of rebuilding or replacing your vehicle’s engine. Modern internal combustion engines are quite complex – with a wide...
      by Richard Reina
    • Shift Knobs
      January 19, 2018
      Shopping Guide – Shift Knobs
      The knob at the end of your gearshift lever probably isn't something that most people notice when getting into your car or truck. But for a minimal cost, it can be. We...
      by Timothy Zahl
    • Running Boards
      November 29, 2017
      Shopping Guide - Running Boards
      Running boards date as far back as the automobile itself, being integrated into car and truck designs until falling out of favor after World War II. With the boom in...
      by Timothy Zahl
    • Off-Road Bumpers
      November 28, 2017
      Shopping Guide – Off Road Bumpers | Custom...
      There's a saying that advises out of all the paths you take in life, it's important to make sure a few of them are dirt. But while dirt can be found most anywhere you...
      by Timothy Zahl

    1978 Mercury Grand Marquis Performance Parts Reviews

    Average rating:  3.5  3.5 - 3 reviews
    2.8 of 5
    If You Have to
    My '92 SC400 was leaking cooling fan oil. It never completely shit out, but I thought, "Why not?" So I paid like $500 for this electric fan that while is lighter, does not keep the motor any cooler. I haven't noticed any kind of gas mileage increase (still at 23 on the highway and like 17 in town) or any kind of power increase (although it must be said I didn't expect much, but the forums gave me a bit of hope). I suppose this conversion is fine, but if my OE fan wasn't dying, I wouldn't have bothered. $500 is $500, man.
    Posted by Tom Fletcher (Stillwater, OK) / July 10, 20181992 Lexus SC
    Was this review helpful for you? Yes
    View More
    Low Prices Price match guarantee
    Guaranteed Fitment Always the correct part
    In-House Experts We know our products
    Easy Returns Quick & Hassle Free

    All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only. It is neither inferred nor implied that any item sold by CARiD.com is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.

    SECURE SHOPPING