1989 Eagle Medallion Spark Plugs

Essential 1989 Eagle Medallion Spark Plugs

NGK – Iridium IX Spark Plug: Single Iridium Fine Wire, TR5IX (Part No.7397)

Iridium IX Spark Plug: Single Iridium Fine Wire, TR5IX

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$11.99
NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode’s durability is six times harder than platinum. Iridium alloy’s extremely high melting point is perfect for today’s engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

Product Features:
  • SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
  • IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
  • TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
  • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
  • TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
  • RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
  • Outstanding Acceleration and High Fuel Efficiency: NGK Iridium IX spark plugs are engineered to deliver exceptional acceleration and improved fuel efficiency, making them ideal for performance enthusiasts.
  • Extreme Ignitability and Anti-Fouling: These spark plugs offer extreme ignitability and exceptional resistance to fouling, ensuring reliable performance in various driving conditions.
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Autolite – Racing Resistor Spark Plug: Enables Performance, Handles Intense Conditions (Part No.AR103)

Racing Resistor Spark Plug: Enables Performance, Handles Intense Conditions

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$4.99
The ground electrode is cut-back from the center electrode to provide a gap, and its concave face ensures a constant gap to the center electrode. This design opens the spark face for better ignitability of the flame kernel and retains less heat, transferring it to the shell faster to reduce the risk of pre-ignition. Dyno testing has shown proven power gains, making it ideal for all aftermarket cylinder heads used in various racing venues, including oval and road racing. The cut-back ground electrode is an evolution from the practice of grinding back the side electrode, and it features a tapered seat type for optimal performance.

Product Features:
  • Opens spark face for better ignitability of flame kernel
  • Retains less heat, transfers heat to shell faster – reduces risk of pre-ignition
  • Dyno testing has shown proven power gains
  • Cut-back ground electrode evolved from practice of grinding back the side electrode
  • Optimal Performance: Features a tapered seat type for optimal performance in various racing venues, including oval and road racing.
  • Durable Design: Specifically designed to handle intense conditions, making it suitable for all aftermarket cylinder heads used in racing.
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Dorman – Help – Spark Plug Non-Foulers – 14mm Tapered Seat (Part No.42008)

Spark Plug Non-Foulers - 14mm Tapered Seat

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$9.99
This spark plug non fouler is designed for easy installation on specified vehicles to protect spark plugs from fouling and damage. It is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this spark plug non fouler is designed for easy installation to protect spark plugs from fouling and damage on specified vehicles
  • Ideal solution – this non-fouler preserves spark plug life and is a reliable replacement for an original non-fouler that has failed due to corrosion
  • Durable construction – made from quality components to ensure reliable performance and a long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
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Autolite – Platinum Spark Plug: Fires Cleaner, Easier Starts, Quicker Acceleration (Part No.AP103)

Platinum Spark Plug: Fires Cleaner, Easier Starts, Quicker Acceleration

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$4.79
With over 100 years of engineering expertise and more than 11 billion plugs sold, Autolite delivers unmatched reliability. Designed and engineered in the USA, these spark plugs feature a high nickel alloy side electrode that maintains a precise gap and a full platinum tip that ensures virtually no gap erosion for extended life. The necked-down center electrode fires quicker and cleaner with less voltage, providing easier starts, quicker acceleration, and improved fuel economy compared to standard plugs. The tapered seat type further enhances performance and durability.

Product Features:
  • High nickel alloy side electrode maintains precise gap
  • Full platinum tip assures virtually no gap erosion for long life
  • Necked-down center electrode fires quicker, cleaner with less voltage for easier starts, quicker acceleration and improved fuel economy (as compared to standard plugs)
  • Tapered Seat Type: Enhances performance and durability for a longer-lasting spark plug.
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Champion – Copper Plus Spark Plug: Dependable Performance, OE Replacement, RS9YC (Part No.304)

Copper Plus Spark Plug: Dependable Performance, OE Replacement, RS9YC

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$3.99
The Champion Spark Plug Copper Plus Spark Plug RS9YC is a reliable and high-performing OE replacement spark plug. It features a copper core center electrode that provides accurate control of heat range, ensuring optimal performance and fuel efficiency. The spark plug is built to ISO and SAE standards, ensuring proven performance and durability. The center electrode tip material is made of nickel, while the resistor type is designed to reduce electromagnetic interference. The tapered seat type ensures a secure fit and easy installation. Overall, the Champion Spark Plug Copper Plus Spark Plug RS9YC is a dependable choice for those seeking a high-quality spark plug replacement that delivers consistent performance and fuel efficiency.
  • Copper core center electrode allows for accurate control of heat range for longer life
  • Built to ISO and SAE standards for proven performance
  • Built to ISO and SAE standards for proven performance
  • Dependable Performance: The Copper Plus Spark Plug is designed to provide reliable and consistent performance, ensuring that your vehicle runs smoothly and efficiently.
  • OE Replacement: This spark plug is an exact replacement for the original equipment (OE) part, ensuring a perfect fit and optimal performance.
  • Nickel Center Electrode Tip Material: The center electrode tip of this spark plug is made from nickel, which provides superior conductivity and durability compared to other materials.
  • Tapered Seat Type with Resistor: The tapered seat type of this spark plug ensures a secure fit in the engine block, while the built-in resistor helps reduce electromagnetic interference for improved performance.
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    Champion – Platinum Power Spark Plug: Powerful Perfromance, OE Replacement, RS10PYC4 (Part No.3401)

    Platinum Power Spark Plug: Powerful Perfromance, OE Replacement, RS10PYC4

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    $4.49
    Champion Platinum Power spark plugs deliver powerful performance. Made from exclusive Heat-Active alloy, a fine-wire center electrode and V-trimmed ground electrode provides sharp spark focus.

    Product Features:
    • Platinum Power- Premium Spark Plug. Powerful Performance.
    • Platinum center electrode for long life
    • Fine-wire center electrode for greater ignitability
    • V-trimmed ground electrode promotes sharper spark focus
    • Heat-Active alloy allows electrodes to reach optimal temperature
    • Platinum tipped center wire resists wear and helps to maintain proper gap spec over life of the plug
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    Autolite Iridium – Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition (Part No.XP103)

    Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition

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    $9.99
    Our best spark plug! Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, the Autolite Iridium XP spark plugs feature an iridium-enhanced 0.6mm finewire design and patented platinum sidewire technology to provide better overall durability and a more focused ignition for enhanced ignitability and performance. Features double Iridium-enhanced alloy technology center electrode for improved durability and wear resistance.

    Product Features:
    • 0.6 mm finewire design improves ignitability
    • Patented V-trimmed platinum sidewire technology resists wear
    • OE equivalent design is engineered for every engine
    • Designed for better overall durability with virtually no gap erosion
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    NGK – OE Series Laser Platinum Spark Plug: Fine Wire Tip Design, PTR5F-11 (Part No.6579)

    OE Series Laser Platinum Spark Plug: Fine Wire Tip Design, PTR5F-11

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    $16.99
    NGK Laser Platinum spark plugs provide high ignitability and longer service life compared to conventional nickel spark plugs. Laser Platinum plugs are tested to the highest standards to ensure quality and durability. Engineered specifically for OE applications. Laser platinum plugs provide stable idling, superior anti-fouling, improved fuel efficiency and lower emissions. High-grade pure alumina ceramic and 98% pure copper core prevents spark plug from overheating and provides reliable starts. Most Laser Platinum spark plugs feature a platinum pad on the ground electrode for even wear in distributorless ignition systems.

    Product Features:
    • ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction fine wire platinum alloy center electrode provides consistent performance
    • PLATINUM ALLOY CENTER ELECTRODE: Longer wearing and higher temperature resistance compared to traditional nickel spark plugs
    • PLATINUM TIP GROUND ELECTRODE: Unless OE specified, platinum protection at the ground electrode provides excellent ignitability and service life
    • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
    • TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
    • RECOMMENDED USAGE: Best for vehicles with OE fine wire platinum alloy plugs
    • Engineered for OE Applications: Specifically designed for Original Equipment (OE) applications, ensuring a perfect fit and optimal performance.
    • Enhanced Fuel Efficiency and Lower Emissions: These spark plugs contribute to improved fuel efficiency and reduced emissions, making them an eco-friendly choice.
    • Stable Idling and Anti-Fouling: The platinum pad on the ground electrode provides even wear, resulting in stable idling and superior anti-fouling performance.
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    Champion – Iridium Spark Plug: Maximum Performance, OE Replacement, RS8WYPB5 (Part No.9808)

    Iridium Spark Plug: Maximum Performance, OE Replacement, RS8WYPB5

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    $8.49
    Champion Iridium – the ultimate element. This spark plug’s fine-wire iridium center and platinum ground electrodes provide the sharpest spark focus for maximum performance.

    Product Features:
    • Champion Iridium – Maximum Performance. Premium Spark Plug
    • Iridium center electrode delivers maximum life
    • Fine-wire center electrode and V-trimmed for greater ignitability
    • V-trimmed ground electrode promotes sharper spark focus
    • Maintains stable operating temperature under all engine loads
    • Heat-Active alloy allows electrodes to reach optimal temperature quickly
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    DENSO – Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IT20 (Part No.5326)

    Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IT20

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    $11.99
    Increased performance with World’s smallest Iridium Center Eletrode (0.4mm).

    Product Features:
    • World’s smallest Iridium Center Electrode (0.4mm) for improved spark for maximum combustion
    • Patented 360-degree laser welding assembly process
    • U-groove and taper cut ground electrode to maximize flame propagation.
    • Withstands temperatures greater than 4000° Fahrenheit
    • Burnished nickel plating for high temperature endurance and superior corrosion resistance
    • Wide range of part numbers for thousands of applications, including classic and collector cars
    • Iridium Power
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    Autolite – Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration (Part No.103)

    Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration

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    $3.49
    Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Guaranteed to deliver quick starts, good fuel economy and smooth acceleration, Autolite Copper Core spark plugs are designed to meet or exceed OES design requirements. Consider upgrading to Autolite Platinum, Double Platinum or Iridium XP plugs for improved engine performance. Copper core plugs are the industry standard.

    Product Features:
    • 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”
    • One-piece terminal post adds strength
    • Resistor reduces radio frequency interference (RFI) and electrode erosion
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    DENSO – Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, last 100K+ Miles, IT20TT (Part No.4714)

    Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, last 100K+ Miles, IT20TT

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    $10.99
    Durability of an OE style plug combined with Power & Torque of high performance.

    Product Features:
    • 0.4mm Iridium Center Electrode: World’s Smallest Diameter that maximizes firing potential
    • 0.7mm Needle Tip Ground Electrode: Promotes higher spark energy and less heat quenching
    • DENSO Patented Optimized Iridium-Rhodium Alloy Formula: Highest concentration of Iridium vs. competitors for greater durability
    • DENSO Patented 360 degree laser welding process: Ensuring exceptional quality bond and structural strength with the Iridium Center Electrode
    • Durability of an OE style plug combined with Power & Torque of high performance.
    • Withstands temperatures greater than 4000° Fahrenheit
    • Iridium TT
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    ACDelco – Double Platinum Spark Plug (Part No.41-812)

    Double Platinum Spark Plug

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    $9.79
    ACDelco Gold (Professional) Double Platinum Spark Plug are a high quality alternative to Original Equipment (OE) parts. With a copper core and double platinum pads on the center electrode, these plugs are designed to deliver long-lasting performance. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.

    Product Features:
    • One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal that helps reduce radio frequency and engine interference, regulate spark plug energy, and protect against compression pressures for long life
    • Double platinum point pad on center and ground electrode offer excellent durability and consistent voltage demands to help reduce wear on ignition system
    • Pure copper core results in cooler electrode temperature for maximized durability and fouling resistance
    • Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
    • Premium aftermarket replacement part
    • Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models
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    NGK – OE Series V-Power Nickel Spark Plug: V-Groove Tip Design, TR5 (Part No.2238)

    OE Series V-Power Nickel Spark Plug: V-Groove Tip Design, TR5

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    $4.49
    NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. Engineered specifically for OE applications, the special V-cut nickel alloy center electrode and concave ground electrode of NGK’s V-Power spark plug increases ignitability providing quicker starts and smoother idle. NGK’s legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties.

    Product Features:
    • ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction nickel alloy center electrode with V-groove provides consistent performance
    • RECOMMENDED USAGE: Best for vehicles with OE nickel alloy plugs, not recommended on vehicles with factory precious metal plugs
    • NGK’s OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance
    • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
    • COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
    • TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
    • Enhanced Ignitability: The V-cut nickel alloy center electrode and concave ground electrode design of NGK V-Power spark plugs provide quicker starts and smoother idle.
    • OE Application Specific: Engineered specifically for Original Equipment (OE) applications, ensuring compatibility and reliable performance.
    • V-Groove Tip Design: The unique V-groove tip design of the center electrode enhances ignitability and overall engine performance.
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    Champion – Double Platinum & Power Spark Plug Exceptional Perf OE Replacement RS9PYP4 (Part No.7304)

    Double Platinum & Power Spark Plug Exceptional Perf OE Replacement RS9PYP4

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    $7.29
    Champion® Double Platinum Power¿ spark plugs deliver more powerful performance. Featuring exclusive Heat-Active¿ alloy, platinum fine wire center electrode and platinum pad ground electrode provide maximum life and sharper spark focus.

    Product Features:
    • Double Platinum Power – Premium Spark Plug. More Powerful Performance.
    • Platinum center and ground electrode for greater wear resistance
    • Maintains stable operating temperature under all engine loads
    • Fine-wire center electrode for greater ignitability
    • V-trimmed ground electrode promotes sharper spark focus
    • Heat-Active┐ alloy allows electrodes to reach optimal temperature
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    NGK – G-Power Spark Plug: Single Platinum Tip Design, TR5GP (Part No.3186)

    G-Power Spark Plug: Single Platinum Tip Design, TR5GP

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    $6.29
    NGK G-Power Platinum spark plugs are the best single platinum spark plugs at an economical price. G-Power plugs feature a fine wire platinum center electrode and a trapezoidal cut ground electrode that offers increased durability, improved fuel efficiency, lower emissions, faster starts and quicker acceleration over conventional nickel spark plugs. An excellent upgrade for vehicles which used nickel alloy spark plugs originally. For better performance consider upgrading to a NGK Iridium IX plug. For even greater performance consider upgrading to a NGK RUTHENIUM HX plug.

    Product Features:
    • SINGLE PLATINUM TIP: Fine wire 0.6 millimeter platinum tip center electrode ensures improved durability and a consistently stable spark
    • PLATINUM ALLOY: G-Power platinum provides exceptional value with increased performance and longer service intervals than factory nickel plugs
    • TRAPEZOIDAL CUT GROUND ELECTRODE: Reduces quenching design produces improved ignitability and performance
    • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
    • COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
    • RECOMMENDED USAGE: Lower cost alternative to double precious metal spark plugs or as an upgrade to OE nickel alloy spark plugs
    • Tapered Seat Type: The tapered seat type ensures a secure fit and optimal performance in compatible vehicles.
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    DENSO – PT20TT Platinum TT Spark Plug (Part No.4512)

    PT20TT Platinum TT Spark Plug

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    $3.99
    Twin-Tip design enables faster flame propagation for more complete combustion.
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    Motorcraft – Enhance Engine Performance with Reliable Spark Plug (Part No.SP-439-AX)

    Enhance Engine Performance with Reliable Spark Plug

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    $12.49
    Motorcraft Spark Plugs are original equipment on Ford Motor Company vehicles engineered to meet strict Ford engineering standards to provide original equipment performance and reliability. Delivering performance, reliability and confidence, Motorcraft spark plugs are available for a broad range of applications, including domestic and import cars and trucks of all makes and sizes.

    Product Features:
    • Motorcraft spark plugs are matched to specific engines to provide enhanced durability, eliminate misfires, reduce fuel consumption and optimize emissions.
    • Backed by Motorcraft’s Service Parts Warranty
    • Exact fit for Ford, Lincoln and Mercury vehicles
    • Resistant to oxidation and arc erosion.
    • Multi-rib insulator protects against misfire.
    • Service intervals of up to 100,000 miles.
    • Motorcraft Spark Plugs are designed with high quality materials to provide reliable performance for almost any application.
    • Motorcraft Spark Plugs are what was in the vehicle when it was manufactured
    • Motorcraft ignition components help prevent false check engine lights.
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    Autolite – Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life (Part No.APP103)

    Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life

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    $6.79
    Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, Autolite Double Platinum spark plugs feature platinum-to-platinum firing which virtually eliminates gap erosion, reduces misfires and increases durability of the plug. Consider upgrading to Autolite Iridium XP spark plugs for increased performance.

    Product Features:
    • Works to optimize engine performance for a longer life and improved fuel economy
    • OE design
    • Full-platinum tips; platinum on both the center and side electrodes to promote reduced gap wear
    • Platinum ball welding process provides a consistent point of contact for enhanced adhesion
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    ACDelco – RAPIDFIRE Spark Plug (Part No.16)

    RAPIDFIRE Spark Plug

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    $5.99
    ACDelco Gold (Professional) RAPIDFIRE Spark Plugs are a high quality alternative to Original Equipment (OE) parts. These RAPIDFIRE Single Platinum Performance Spark Plugs are designed for everyday use and are a high quality replacement for many vehicles on the road today. These premium aftermarket spark plugs have high-quality suppressors that help prevent misfiring, an improved plug to boot seal, and a pure copper core for greater durability. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.

    Product Features:
    • Solid state suppressor, with two-piece glass and brass seal, can help reduce radio frequency interference, regulates spark energy for long electrode life, and helps protect against high combustion pressures
    • Pure copper core provides great heat transfer and helps maximize plug durability
    • Platinum on center electrode enables superior spark characteristics and can reduce voltage requirements of the ignition system
    • Ribless insulator helps optimize plug to boot sea
    • Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
    • Premium aftermarket replacement part
    • Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models
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    NGK – OE Series Laser Iridium Spark Plug: Fine Wire Tip Design, ITR5H13 (Part No.97287)

    OE Series Laser Iridium Spark Plug: Fine Wire Tip Design, ITR5H13

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    $18.99
    NGK Laser Iridium spark plugs offer the best combination of performance and longevity. Engineered specifically for OE applications, Laser Iridium spark plugs are tested to the highest standards to ensure quality and durability. Iridium tipped center electrode provides durability six times harder than platinum. NGKs high grade pure alumina ceramic and 98 percent pure copper core prevents the spark plug from overheating while providing reliable starts. Most Laser Iridium spark plugs feature a platinum pad on the ground electrode for even wear in distributorless ignition systems.

    Product Features:
    • ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction fine wire iridium alloy center electrode provides consistent performance
    • IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
    • PLATINUM TIP GROUND ELECTRODE: Unless OE specified, platinum protection at the ground electrode provides excellent ignitability and service life
    • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
    • TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
    • RECOMMENDED USAGE: Best for vehicles with OE fine wire iridium alloy plugs
    • Superior Durability: The iridium-tipped center electrode is six times harder than platinum, ensuring long-lasting performance.
    • OE Application Specific: Engineered specifically for Original Equipment (OE) applications, ensuring a perfect fit and optimal performance.
    • Even Wear: Features a platinum pad on the ground electrode for even wear, particularly beneficial in distributorless ignition systems.
    • Fine Wire Tip Design: The fine wire tip design of the ITR5H13 model enhances ignition efficiency and performance.
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    E3 – DiamondFIRE Automotive Spark Plug: More Power, Saves Gas (Part No.E3.53)

    DiamondFIRE Automotive Spark Plug: More Power, Saves Gas

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    $6.99
    The Spark Plugs are the product of years of fundamental research in the combustion field. The unique patented electrode configuration of these new The spark plugs increases the amount of combustion pressure created during each power stroke of an engine, which results in a marked increase in power output, fuel economy, and reduced emissions in all gasoline engines. E3.53 is a 14mm, .708 reach plug with a taper seat. It fits domestic applications, and is widely available in automotive retail stores. The automotive plugs have three legs securing the Diamond Fire electrode to the shell. This allows for excellent heat transfer, and helps to create more turbulence in the cylinder. The patented Diamond Fire side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use.

    Product Features:
    • E3’s Diamond Fire edge to edge ground electrode provides maximum performance with increased efficiency and a faster more complete burn
    • Smoother Acceleration & Idle – The faster flame initiated by the The spark plug results in a more complete burn of the ingested fuel charge. More pressure is created against the piston more fuel is put to work
    • Energy – Power output improved up to 6% on average in the typical operating ranges. Results will vary.
    • Efficiency – The “diamond shaped” side wire electrode projects the combustion spark in a way that more quickly ignites the air/fuel mixture, thereby creating a significantly faster and larger flame kernel. The result is that more fuel is put to work durin
    • E3’s patented Diamond Fire Technology provides a cleaner burning combustion, which translates into fuel savings and reduced engine carbon deposits
    • The Spark Plugs are pre-gapped at the factory and cannot be adjusted.
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    Motorcraft – Spark Plug (AGSF32FECF4) (Part No.SP-439-A)

    Spark Plug (AGSF32FECF4)

    from

    $7.79
    Motorcraft Spark Plugs are original equipment on Ford Motor Company vehicles engineered to meet strict Ford engineering standards to provide original equipment performance and reliability. Delivering performance, reliability and confidence, Motorcraft spa

    Product Features:
    • Motorcraft spark plugs are matched to specific engines to provide enhanced durability, eliminate misfires, reduce fuel consumption and optimize emissions.
    • Backed by Motorcraft’s Service Parts Warranty
    • Exact fit for Ford, Lincoln and Mercury vehicles
    • Resistant to oxidation and arc erosion.
    • Multi-rib insulator protects against misfire.
    • Service intervals of up to 100,000 miles.
    • Motorcraft Spark Plugs are designed with high quality materials to provide reliable performance for almost any application.
    • Motorcraft Spark Plugs are what was in the vehicle when it was manufactured
    • Motorcraft ignition components help prevent false check engine lights.
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    1989 Eagle Medallion Spark Plugs

    Maybe you’re in the middle of a full rebuild of that 1989 Eagle Medallion. Maybe you just need a couple of Spark Plugs. Either way, Advance Auto Parts has 24 different Spark Plugs in our inventory ranging from $3.49 to $18.99. That means you can find the exact parts or products you need to keep that 1989 Eagle Medallion running smoothly.

    Spark Plugs are only as good as their brand. We stock 8 different brands to make sure you have plenty of trusted parts to choose from for your 1989 Eagle Medallion. NGK, Autolite, and E3 are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

    We know you’ll find the perfect Spark Plugs for your 1989 Eagle Medallion, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 1,282 reviews in this category, some of the top rated parts include Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life with 4.8 stars and DiamondFIRE Automotive Spark Plug: More Power, Saves Gas with 4.0 stars.

    So if you’re in the market for aftermarket Spark Plugs to keep your 1989 Eagle Medallion rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

    Spark Plugs Brands To Make Your 1989 Eagle Medallion Last

    Simple repair, complete replacement, or a full rebuild. No matter the job, your 1989 Eagle Medallion demands trusted brand parts and products to keep it running. Many trusted brands of Spark Plugs make up Advance Auto Parts’ inventory, and all are ready to help make your Medallion the best it can be. Be sure to browse some of our top Spark Plugs brands and parts.

    Popular Dorman – Help Spark Plugs

    We carry Dorman – Help parts in our stock across Spark Plugs categories, plus more. For a 1989 Eagle Medallion, our most popular Dorman – Help Spark Plugs include:

    FAQs for 1989 Eagle Medallion Spark Plugs

    What are the most purchased Spark Plugs for the 1989 Eagle Medallion?

    Out of 24 Spark Plugs for the 1989 Eagle Medallion, the most popular in our inventory are:
    Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition
    from $9.99
    This product is not rated
    Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition
    Spark Plugs

    What are the top-rated 1989 Eagle Medallion Spark Plugs?

    Top-rated Spark Plugs for your 1989 Eagle Medallion based on customer reviews/ratings are:
    Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life
    from $6.79
    (53)
    Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life
    “I debated between platinum, double platinum, and iridium plugs as a suitable replacement for my copper-based plugs in my V12 Jaguar. I settled on the ”
    DiamondFIRE Automotive Spark Plug: More Power, Saves Gas
    from $6.99
    (35)
    DiamondFIRE Automotive Spark Plug: More Power, Saves Gas
    “I’ve installed these in my S10 and not had a problem with them. I drive mainly highway miles and gained 5% in fuel mileage. Will keep useing E3’s”
    Racing Resistor Spark Plug: Enables Performance, Handles Intense Conditions
    from $4.99
    (5)
    Racing Resistor Spark Plug: Enables Performance, Handles Intense Conditions
    “worked very well,engine light went out also”