2021 Ford F-450 Super Duty Spark Plugs

Keep Your 2021 Ford F-450 Super Duty in Top Shape with Quality Spark Plugs

Whether you’re repairing or upgrading your Spark Plug, using high-quality parts is key to keeping your 2021 Ford F-450 Super Duty looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Single Spark Plug Wires and Spark Plugs. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Spark Plugs from Trusted Brands

Looking for a reliable Spark Plug? We’ve got you covered with options from brands you know and trust like Autolite. For example, Autolite Spark Plugs start at just $6.99 with an average 4.6 star rating. With over 129 reviews and a solid 5 star average, you can shop with confidence knowing other Ford F-450 Super Duty owners approve.

Competitive Prices and Extensive Inventory

The average price for a 2021 Ford F-450 Super Duty Spark Plug at Advance Auto Parts is around $14.32, with a range that starts at $6.99 and goes up to $39.99. With 6 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like Iridium Ultra Fine Wire Spark Plug: Laser Welded for Optimum Performance, High-Performance Spark Plug: Enhances Fuel Efficiency, and Single Lead Spark Plug Wire start at just $7.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Spark Plug, don’t forget to check out other key components like Ignition Sensors and Ignition Switches. At Advance Auto Parts, we’re here to help you keep your 2021 Ford F-450 Super Duty in peak condition, inside and out.

Essential 2021 Ford F-450 Super Duty Spark Plugs

Motorcraft – Double Platinum Spark Plug (HJFS24FP): Enhanced Durability & Reliability (Part No.SP-509)

Double Platinum Spark Plug (HJFS24FP): Enhanced Durability & Reliability

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$14.49
Double Platinum Spark Plug (HJFS24FP) offers exceptional durability and reliability, making it the ideal choice for maintaining peak engine performance. Engineered to meet strict Ford standards, these spark plugs are an exact fit for Ford, Lincoln, and Mercury vehicles, ensuring seamless compatibility. Featuring platinum center and ground electrode tips, they resist oxidation and arc erosion, delivering long-lasting performance with service intervals of up to 100,000 miles. The multi-rib insulator design protects against misfires, while the advanced construction helps reduce fuel consumption, optimize emissions, and prevent false check engine lights. Backed by Motorcraft’s Service Parts Warranty, these spark plugs are crafted with high-quality materials to provide reliable performance across a wide range of domestic and import cars and trucks. Whether you’re replacing original equipment or upgrading, these spark plugs deliver the confidence and reliability you need for smooth, efficient operation.

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 Iridium – Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition (Part No.XP5363)

Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition

from

$10.99
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
  • Double Iridium-Enhanced Alloy Technology Center Electrode: Offers improved durability and wear resistance for a longer-lasting spark plug.
  • Engineered in the USA: Designed with over 100 years of Autolite’s engineering experience for superior quality and performance.
  • Proven Track Record: Part of a legacy with over 11 billion spark plugs sold, ensuring trusted performance and reliability.
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Motorcraft – Platinum Spark Plug (AGSF22WM): Enhanced Durability & Reliability (Part No.SP-479)

Platinum Spark Plug (AGSF22WM): Enhanced Durability & Reliability

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$6.79
Platinum Spark Plug (AGSF22WM) offers enhanced durability and reliability, making it the ideal choice for maintaining peak performance in Ford, Lincoln, and Mercury vehicles. Engineered to meet strict Ford standards, these spark plugs are crafted with platinum center and ground electrode tips for superior resistance to oxidation and arc erosion, ensuring long-lasting performance. The tapered seat design and multi-rib insulator work together to eliminate misfires, reduce fuel consumption, and optimize emissions, while preventing false check engine lights. With service intervals of up to 100,000 miles, these spark plugs deliver exceptional value and reliability for both domestic and import cars and trucks. Backed by Motorcraft’s Service Parts Warranty, they are the exact fit for your vehicle, providing the same high-quality performance as the original equipment installed during manufacturing. Designed for a broad range of applications, Motorcraft spark plugs are the trusted solution for drivers seeking confidence and efficiency on the road.

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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Champion – Copper Plus Spark Plug (RS9YC): Dependable Performance & Durability (Part No.304)

Copper Plus Spark Plug (RS9YC): Dependable Performance & Durability

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$4.99
Copper Plus spark plug delivers dependable performance and durability, making it an ideal choice for maintaining your vehicle’s efficiency. Featuring a copper core center electrode, it ensures precise heat control for extended lifespan and consistent wear. The nickel-tipped center and ground electrodes enhance conductivity while resisting corrosion, ensuring reliable ignition under various conditions. Designed to meet ISO and SAE Standards, this spark plug guarantees proven performance and compatibility with standard replacement needs. Its tapered seat type and built-in resistor further optimize functionality, making it a trusted solution for smooth engine operation. Invest in this high-quality spark plug for superior reliability and value.

Product Features:
  • 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
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Motorcraft – Spark Plug: Enhanced Durability & Optimized Performance (Part No.SP-546-X)

Spark Plug: Enhanced Durability & Optimized Performance

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$19.49
Spark Plug: Enhanced Durability & Optimized Performance is engineered to meet strict Ford standards, ensuring original equipment performance and reliability for Ford, Lincoln, and Mercury vehicles. Designed with a fine wire platinum center electrode and nickel ground electrode tip, these spark plugs deliver exceptional durability, resist oxidation and arc erosion, and help eliminate misfires. The multi-rib insulator enhances protection against misfires, while the tapered seat type ensures a precise fit. With service intervals of up to 100,000 miles, these spark plugs reduce fuel consumption, optimize emissions, and prevent false check engine lights, offering peace of mind and long-lasting performance. Backed by Motorcraft’s Service Parts Warranty, they are crafted from high-quality materials to provide reliable performance across a wide range of domestic and import cars and trucks. Motorcraft Spark Plugs are the trusted choice for maintaining the integrity of your vehicle, as they are the same components used during manufacturing.

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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Champion – Iridium Spark Plug (RET8ZWYPB): Maximum Performance & Longevity (Part No.9406)

Iridium Spark Plug (RET8ZWYPB): Maximum Performance & Longevity

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$8.99
Champion Iridium Spark Plug is engineered for maximum performance and durability, making it the ultimate choice for demanding drivers. Featuring a fine-wire iridium center electrode and platinum ground electrodes, it delivers exceptional ignitability and a sharper spark focus for enhanced engine efficiency. The V-trimmed ground electrode ensures precise spark delivery, while the Heat-Active alloy allows the electrodes to quickly reach and maintain optimal operating temperatures under all engine loads. Designed with a tapered seat and resistor type, this premium spark plug offers superior performance and extended longevity. Whether you’re looking for stable operation or maximum life, the Champion Iridium Spark Plug is built to meet the highest Standards of reliability and 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
  • Platinum Ground Electrodes: Equipped with platinum ground electrodes, this spark plug promotes a sharper spark focus for enhanced ignitability.
  • Tapered Seat and Resistor Type: Designed with a tapered seat type and resistor type, the Champion Iridium Spark Plug ensures superior performance and longevity.
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Champion – Iridium Spark Plug (RS8WYPB5): Maximum Performance & Longevity (Part No.9808)

Iridium Spark Plug (RS8WYPB5): Maximum Performance & Longevity

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$8.49
The Champion Iridium Spark Plug is engineered for maximum performance and longevity, making it a premium choice for your vehicle. Featuring a fine-wire iridium center electrode and a V-trimmed iridium-platinum ground electrode, this spark plug ensures sharper spark focus and greater ignitability for optimal engine efficiency. Its Heat-Active alloy allows the electrodes to quickly reach and maintain stable operating temperatures under all engine loads, ensuring consistent performance. Designed with a tapered seat and built-in resistor, it delivers reliable operation while reducing interference. The iridium center electrode is crafted for maximum durability and extended life, making it ideal for high-performance applications. Whether you’re looking to enhance your vehicle’s ignition system or maintain peak engine performance, this spark plug offers exceptional value and reliability.

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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$13.99
The Iridium Power Spark Plug features the world’s smallest Iridium Center Electrode at just 0.4mm, delivering enhanced spark energy for maximum combustion efficiency. Engineered with a patented 360-degree laser welding assembly process, this spark plug ensures unmatched durability and precision. Its U-groove and taper-cut ground electrode design optimizes flame propagation, resulting in improved engine performance. Built to withstand extreme temperatures exceeding 4000 degrees Fahrenheit, it is burnished with nickel plating for exceptional high-temperature endurance and superior corrosion resistance. Designed for versatility, it offers a wide range of part numbers to fit thousands of applications, including classic and collector cars. With its advanced Iridium tip material and tapered seat type, this spark plug is the ultimate choice for drivers seeking peak performance and long-lasting reliability.

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 degree 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 – Double Platinum Spark Plug: Enhanced Durability & Performance (Part No.APP103)

Double Platinum Spark Plug: Enhanced Durability & Performance

from

$6.99
The Double Platinum Spark Plug is engineered for exceptional durability and performance, making it a top choice for distributor-less ignition system (DIS) engines. Featuring a platinum-to-platinum design, it minimizes gap erosion and reduces misfires, ensuring a longer service life compared to copper and standard platinum plugs. Its yttrium-enhanced ground electrode delivers superior heat transfer, allowing it to withstand high temperatures and pressures for extended durability. The high alumina ceramic insulator optimizes thermal conductivity and dielectric strength, while the multi-rib insulator prevents flash-over for reliable operation. With a mid-projection center electrode and tapered seat type, this performance-grade spark plug is built to deliver consistent ignition and efficiency. Both the center and ground electrode tips are crafted from platinum, ensuring robust functionality and reliability. Designed to meet the demands of modern engines, this spark plug offers outstanding value and long-lasting performance.

Product Features:
  • Engineered with a platinum-to-platinum design that prevents gap erosion, extending the life of the spark plug.
  • The yttrium-Enhanced Ground Electrode delivers superior heat transfer that delivers more durability under high temps and pressure for greater life.
  • Its high alumina ceramic insulator provides optimum thermal conductivity and dielectric strength.
  • The multi-rib insulator prevents flash-over.
  • Designed with a mid-projection center electrode and tapered seat type to ensure consistent ignition and improved engine efficiency.
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NGK – Laser Platinum Spark Plug (PZNAR6A11H): Enhanced Ignitability & Longevity (Part No.5507)

Laser Platinum Spark Plug (PZNAR6A11H): Enhanced Ignitability & Longevity

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$28.99
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
  • Enhanced Fuel Efficiency and Lower Emissions: These spark plugs contribute to improved fuel efficiency and reduced emissions, making them an eco-friendly choice.
  • Superior Anti-Fouling and Stable Idling: The advanced design provides stable idling and superior resistance to fouling, ensuring consistent engine performance.
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Autolite – High Thread Spark Plug: Enhanced Durability & Focused Ignition (Part No.HT2)

High Thread Spark Plug: Enhanced Durability & Focused Ignition

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$11.99
Autolite High Thread Pro plugs are expertly crafted for Ford 3V engines, offering unmatched performance and reliability. Featuring a fine-wire platinum center electrode, these plugs deliver focused ignition power and extended service life, ensuring your engine operates at peak efficiency. The extra-long special electrode projection enhances combustion precision, while the nickel-plated shell provides superior corrosion resistance for lasting durability. Designed with a tapered seat and a proprietary thread position above the cylinder head, these plugs create a compressive seal that boosts heat management and fouling resistance. The ground strap improves heat transfer compared to standard J-gap plugs, while the advanced dielectric strength ensures consistent performance under demanding conditions. Perfect for performance-grade applications, these spark plugs are engineered to optimize power, heat transfer, and ignition focus, making them a valuable upgrade for maintaining and enhancing your Ford 3V engine’s capabilities.

Product Features:
  • Engineered with a fine-wire platinum design that provides more focused ignition power and longer service life.
  • The ground strap provides improved heat transfer over standard J-gap plugs.
  • Its proprietary design improves performance for heat management, fouling resistance & increased dielectric strength.
  • The position of the thread above the cylinder head seating allows for a more compressive seal.
  • Designed with a nickel-plated shell that delivers increased protection against corrosion.
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ACDelco – Double Platinum Spark Plug: Long-Lasting Performance & Durability (Part No.41-812)

Double Platinum Spark Plug: Long-Lasting Performance & Durability

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$10.29
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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E3 – DiamondFIRE Automotive Spark Plug: More Power & Fuel Efficiency (Part No.E3.53)

DiamondFIRE Automotive Spark Plug: More Power & Fuel Efficiency

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$8.49
The Premium DiamondFire Automotive Spark Plug is engineered to deliver peak performance and efficiency for your vehicle. Featuring E3’s patented Diamond Fire edge-to-edge ground electrode, it ensures a faster, more complete burn for smoother acceleration and idle. The innovative “diamond-shaped” side wire electrode enhances combustion by quickly igniting the air/fuel mixture, resulting in a larger and faster flame kernel. This translates to improved power output – up to 6% on average – and better fuel efficiency, saving you money while reducing engine carbon deposits. Constructed with durable nickel for both the center and ground electrode tips, this spark plug is built to last. Its tapered seat design ensures a secure fit, and the pre-gapped configuration eliminates the need for adjustments, making installation hassle-free. With its advanced technology, this spark plug not only boosts performance but also promotes cleaner combustion, making it a smart upgrade for any vehicle.

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 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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Autolite Iridium – Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition (Part No.XP103)

Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition

from

$10.99
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
  • Double Iridium-enhanced alloy technology ensures superior wear resistance for extended plug life.
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Motorcraft – Single Lead Spark Plug Wire (Part No.WR-6170)

Single Lead Spark Plug Wire

from

$39.99
Motorcraft Single Lead Spark Plug Wires must endure a series of punishing tests including a series of demanding test-to-failure endurance and materials durability tests to ensure their long-lasting quality and operation.

Product Features:
  • The only parts recommended by Ford Motor Company for Ford, Lincoln and Mercury vehicles.
  • Motorcraft ignition system components create and control the electrical functions of engine operation in Ford-built vehicles.
  • The ignition includes the Ignition Coil and modules that generate up to 46,000 volts for spark plug firing as well as the crankshaft position monitor and Power Train Control module or PCM.
  • Motorcraft Ignition components are manufactured to exacting Ford OE specifications and quality standards.
  • As with all Motorcraft aftermarket parts, any engineering innovations or product improvements developed since the vehicle’s manufacture are added to these Ignition components, ensuring the most current technology.
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Most Popular Single Spark Plug Wire for 2021 Ford F-450 Super Duties

Enhance your 2021 Ford F-450 Super Duty with this popular Single Spark Plug Wire we have in stock, for $39.99.

Motorcraft – Single Lead Spark Plug Wire (Part No.WR-6170)

Single Lead Spark Plug Wire

from

$39.99
Motorcraft Single Lead Spark Plug Wires must endure a series of punishing tests including a series of demanding test-to-failure endurance and materials durability tests to ensure their long-lasting quality and operation.

Product Features:
  • The only parts recommended by Ford Motor Company for Ford, Lincoln and Mercury vehicles.
  • Motorcraft ignition system components create and control the electrical functions of engine operation in Ford-built vehicles.
  • The ignition includes the Ignition Coil and modules that generate up to 46,000 volts for spark plug firing as well as the crankshaft position monitor and Power Train Control module or PCM.
  • Motorcraft Ignition components are manufactured to exacting Ford OE specifications and quality standards.
  • As with all Motorcraft aftermarket parts, any engineering innovations or product improvements developed since the vehicle’s manufacture are added to these Ignition components, ensuring the most current technology.
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Best-Selling 2021 Ford F-450 Super Duty Spark Plugs

Upgrade your F-450 Super Duty with one of our 5 best-selling Spark Plugs, earning an average 5 stars rating across 43 reviews.

Autolite Iridium – Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition (Part No.XP5363)

Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition

from

$10.99
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
  • Double Iridium-Enhanced Alloy Technology Center Electrode: Offers improved durability and wear resistance for a longer-lasting spark plug.
  • Engineered in the USA: Designed with over 100 years of Autolite’s engineering experience for superior quality and performance.
  • Proven Track Record: Part of a legacy with over 11 billion spark plugs sold, ensuring trusted performance and reliability.
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Autolite – Double Platinum Spark Plug: Enhanced Durability & Performance (Part No.APP5363)

Double Platinum Spark Plug: Enhanced Durability & Performance

from

$6.99
The Double Platinum Spark Plug is engineered for exceptional durability and performance, making it a top choice for distributor-less ignition system (DIS) engines. Featuring a platinum-to-platinum design, it minimizes gap erosion and reduces misfires, ensuring a longer service life compared to copper and standard platinum plugs. Its yttrium-enhanced ground electrode delivers superior heat transfer, allowing it to withstand high temperatures and pressures for extended durability. The high alumina ceramic insulator optimizes thermal conductivity and dielectric strength, while the multi-rib insulator prevents flash-over for reliable operation. With a mid-projection center electrode and tapered seat type, this performance-grade spark plug is designed to deliver consistent ignition and efficiency. Both the center and ground electrode tips are crafted from platinum, ensuring robust functionality and reliability. Ideal for those seeking enhanced engine performance and longevity, this spark plug is built to meet the demands of modern engines.

Product Features:
  • Engineered with a platinum-to-platinum design that prevents gap erosion, extending the life of the spark plug.
  • The yttrium-Enhanced Ground Electrode delivers superior heat transfer that delivers more durability under high temps and pressure for greater life.
  • Its high alumina ceramic insulator provides optimum thermal conductivity and dielectric strength.
  • The multi-rib insulator prevents flash-over.
  • Designed with a mid-projection center electrode and tapered seat type to ensure consistent ignition and improved engine efficiency.
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Autolite Iridium – Iridium Ultra Fine Wire Spark Plug: Laser Welded for Optimum Performance (Part No.AI5363)

Iridium Ultra Fine Wire Spark Plug: Laser Welded for Optimum Performance

from

$10.99
Autolite Iridium Ultra Laser Fine wire Spark Plugs are one of our brand’s most technologically advanced products. These spark plugs provide superior durability, more focused ignition with better overall ignitability for optimum performance. Autolite Spark Plugs are the best alternative to OE spark plugs, offering OE fit form and function supporting all foreign and domestic makes and models at a value price. Autolite provides the automotive aftermarket and original equipment manufacturers with the highest quality ignition products and is the leading supplier of spark plugs in the world.

Product Features:
  • Autolite Iridium Ultra is an engineered OE replacement iridium spark plug.
  • A laser-welded 0.5mm pure iridium finewire center electrode provides optimal fuel efficiency, acceleration and focused ignitability.
  • Nickel-plated shell to resist corrosion.
  • High-alumina ceramic insulator for increased strength.
  • Laser welded 0.5mm Iridium finewire center electrode.
  • Proprietary platinum sidewire technology.
  • Superior Durability: Autolite Iridium Ultra Laser Fine wire Spark Plugs are designed to last longer, providing extended service life compared to standard spark plugs.
  • OE Fit and Function: Autolite Spark Plugs are the best alternative to original equipment (OE) spark plugs, offering perfect fit, form, and function for all foreign and domestic makes and models.
  • High-Quality Construction: As a leading supplier of spark plugs globally, Autolite ensures the highest quality ignition products for both the automotive aftermarket and original equipment manufacturers.
  • Value Pricing: Despite their advanced technology and superior performance, Autolite Iridium Ultra Laser Fine wire Spark Plugs are available at a value price, making them an economical choice for vehicle maintenance.
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Motorcraft – High-Performance Spark Plug: Enhances Fuel Efficiency & Durability (Part No.SP-586)

High-Performance Spark Plug: Enhances Fuel Efficiency & Durability

from

$8.99
This premium spark plug is engineered to deliver superior ignition performance, ensuring optimal combustion and enhancing fuel efficiency. Designed with advanced materials and precision manufacturing, it offers exceptional durability and reliability. Ideal for high-performance engines, the Motorcraft High-Performance Spark Plug provides consistent power output, reduces emissions, and extends engine life, making it a perfect choice for those seeking to maximize their vehicle’s performance and efficiency.

Product Features:
  • Superior Ignition Performance: Engineered to deliver optimal combustion, ensuring your engine runs smoothly and efficiently.
  • Enhanced Fuel Efficiency: Designed to maximize fuel economy, helping you save on fuel costs while reducing emissions.
  • Exceptional Durability and Reliability: Constructed with advanced materials and precision manufacturing for long-lasting performance.
  • Consistent Power Output: Ideal for high-performance engines, providing reliable and consistent power to enhance overall vehicle performance.
  • Extended Engine Life: Helps reduce wear and tear on your engine, contributing to a longer engine lifespan.
  • Superior Ignition Performance: Engineered to deliver optimal combustion, ensuring your engine runs smoothly and efficiently.
  • Enhanced Fuel Efficiency: Designed to maximize fuel economy, helping you save on fuel costs while reducing emissions.
  • Exceptional Durability and Reliability: Constructed with advanced materials and precision manufacturing for long-lasting performance.
  • Consistent Power Output: Ideal for high-performance engines, providing reliable and consistent power to enhance overall vehicle performance.
  • Extended Engine Life: Helps reduce wear and tear on your engine, contributing to a longer engine lifespan.
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Motorcraft – High-Performance Spark Plug: Enhances Fuel Efficiency (Part No.SP-589)

High-Performance Spark Plug: Enhances Fuel Efficiency

from

$7.99
The Motorcraft High-Performance Spark Plug is expertly crafted to deliver superior ignition performance and optimize fuel efficiency, ensuring reliable starts and smoother engine operation. Featuring a standard center electrode design with an iridium tip and a nickel ground electrode tip, this spark plug is built for exceptional durability and long-lasting performance. Its tapered seat type ensures a secure fit, making it a dependable choice for maintaining your vehicle’s peak performance. Designed to enhance engine responsiveness and improve overall fuel economy, this spark plug is an excellent upgrade for drivers seeking consistent and efficient performance. With precision engineering and high-quality materials, the Motorcraft High-Performance Spark Plug offers unmatched value, helping you save on fuel costs while keeping your engine running at its best.

Product Features:
  • Enhances Fuel Efficiency: The Motorcraft High-Performance Spark Plug is specifically designed to optimize fuel efficiency, helping you save on fuel costs.
  • Superior Ignition Performance: Engineered for superior ignition performance, this spark plug ensures reliable starts every time.
  • Exceptional Durability: Crafted with precision, the Motorcraft High-Performance Spark Plug offers exceptional durability, providing long-lasting performance.
  • Consistent Performance: This spark plug delivers consistent performance, making it an ideal choice for maintaining your vehicle’s peak performance.
  • Improved Engine Responsiveness: Upgrade to Motorcraft and experience a noticeable difference in your engine’s responsiveness and overall fuel economy.
  • Enhances Fuel Efficiency: The Motorcraft High-Performance Spark Plug is specifically designed to optimize fuel efficiency, helping you save on fuel costs.
  • Superior Ignition Performance: Engineered for superior ignition performance, this spark plug ensures reliable starts every time.
  • Exceptional Durability: Crafted with precision, the Motorcraft High-Performance Spark Plug offers exceptional durability, providing long-lasting performance.
  • Consistent Performance: This spark plug delivers consistent performance, making it an ideal choice for maintaining your vehicle’s peak performance.
  • Improved Engine Responsiveness: Upgrade to Motorcraft and experience a noticeable difference in your engine’s responsiveness and overall fuel economy.
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Top-Rated Spark Plug Brands For Your 2021 Ford F-450 Super Duty

When it comes to finding the perfect Spark Plug for your 2021 Ford F-450 Super Duty, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 2 trusted brands. We carry the most popular Spark Plug brands including Autolite, and more, all known for their exceptional customer ratings (average brand rating of 4.6 stars) and competitive prices, as low as $6.99. Purchasing a Spark Plug from us here at Advance Auto Parts is a smart move for both you and your 2021 Ford F-450 Super Duty, providing peace of mind with parts that meet or exceed OEM standards.

Popular Autolite 2021 Ford F-450 Super Duty Spark Plugs

If you’re looking for a top-quality Spark Plug for your 2021 Ford F-450 Super Duty, Advance Auto Parts has exactly what you need with our selection of Autolite Spark Plugs. We have 2 Autolite Spark Plugs in stock for this fitment, all known for their durability and precision fit. With prices starting at just $6.99 and an average cost of $8.99, you’ll find the perfect Spark Plug for your needs and budget. Autolite Spark Plugs for the 2021 Ford F-450 Super Duty come highly rated, with over 43 customer reviews and an impressive average rating of 4.6 stars. Choosing a Autolite Spark Plug from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Double Platinum Spark Plug: Enhanced Durability & Performance
from $6.99
(2)
Double Platinum Spark Plug: Enhanced Durability & Performance
“Really tuned up the performance of the Ford 6.2 that we were working on.”
Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition
from $10.99
(41)
Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition
“Awesome quality plug and a decent price.”

FAQs for 2021 Ford F-450 Super Duty Spark Plugs

What are the best-selling Spark Plugs for 2021 Ford F-450 Super Duties?

Out of 6 Spark Plugs that fit 2021 Ford F-450 Super Duties, the following parts are the top sellers:

What’s the price range for 2021 Ford F-450 Super Duty Spark Plugs?

The prices of Spark Plugs for the 2021 Ford F-450 Super Duty range from $6.99 up to $39.99 for the most premium parts.

What is the average price of a Spark Plug for a 2021 Ford F-450 Super Duty?

The average price for Spark Plugs for the 2021 Ford F-450 Super Duty is $14.32. Keep in mind the variety of part types within our Spark Plug category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Spark Plugs for other Ford F-450 Super Duty model years?

Yes, we carry Spark Plugs for 25 model years of Ford F-450 Super Duties between 1999 and 2025. The following model years are the most popular for Spark Plug purchases: 2023, 2022, 2020, 2019, 2018, 2017, 2016, 2015, and 2014.

What are the cheapest Spark Plugs for my 2021 Ford F-450 Super Duty?

Does Advance Auto Parts sell Spark Plugs for any other 2021 Ford models?

Yes. We stock Spark Plugs for 22 other popular 2021 Ford models. Some of the most popular are 2021 F-150 Spark Plugs, 2021 Mustang Spark Plugs, 2021 Explorer Spark Plugs, 2021 Bronco Spark Plugs, and 2021 F-250 Super Duty Spark Plugs.

What are the top-rated Spark Plugs that fit the 2021 Ford F-450 Super Duty?

The one 2021 Ford F-450 Super Duty Spark Plug we have in stock is the Double Platinum Spark Plug: Enhanced Durability & Performance. It is rated 5 stars and costs $6.99.

What types of Spark Plugs do you sell for my 2021 Ford F-450 Super Duty?

As of 11/2/25, these are some of the most in-demand types of Spark Plugs for a 2021 Ford F-450 Super Duty:

Can I get help with 2021 Ford F-450 Super Duty Spark Plug orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Ford Spark Plugs and more.

What is your return policy for Ford F-450 Super Duty Spark Plugs?

Advance Auto Parts keeps returns simple. For new Ford F-450 Super Duty Spark Plugs and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.