Best Spark Plug Wires 2021 Reviews Buyer Guide

Best Spark Plug Wires – Reviews & Buyer Guide

Spark plug wires are potentially just as necessary as spark plugs in the proper operation of an engine.

These wires are in charge of transmitting high-voltage pulses from the distributor to the spark plugs, which ignite the air/fuel mixture in the corresponding combustion chamber.

Best Spark Plug Wires to buy in 2021

Spark plug wires, like other parts in your engine bay, can gradually wear out and need to be replaced.

Here, we’ll look at some of the most common and best spark plug wires on the market, focusing on trustworthy brands that offer a wide range of applications for a variety of vehicle makes and models.

Editor’s Choice









JDMSPEED 10.5mm



  • High in performance
  • The 90-degree boots
  • 100 percent pure
Best Pick









ACDelco 9748HH



  • High-end fabrics design
  • Perfect match
  • Fits perfectly
Best Pick









Edelbrock 22716



  • 8.5mm diameter
  • Very low resistance
  • Excellent protection

Taylor Cable 64628

Taylor Cable 64628

With the Taylor Cable 64628, you never have to worry about oil or heat from the engine damaging your spark plug wires. The wires on this set have excellent insulation that can withstand oil and high temperatures.

These are high-energy spark plug wires, and so you can be confident that besides helping your vehicle start better, they ensure you get a significant increase in torque and horsepower.

Moreover,

Another unique element is that the wires have double spring locks at the plugs to ensure they provide a tight fit and will never separate. Motorists also love that they suppress radio frequency interference.

Key features
  • Insulation that is resistant to oil and heat.
  • Wires with a lot of capacity.
  • There are two spring locks.
PROS
  • Better resistance to oil and heat.
  • Increases the amount of horsepower and torque available.
  • Suppression of radiofrequency intrusion.
  • Separation is avoided with more stable locks.
CONS
  • There are no numbers on the wires.
  • It’s a little longer than normal.

Why we choose this product?

These are high-energy spark plug wires, so you can rest assured that, in addition to improving your vehicle’s starting efficiency, you’ll notice a big improvement in torque and horsepower.

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NGK RC-XX90

NGK RC-XX90

Overall, the NGK RC-XX90 is the highest. The wires have a variable pitch winding to ensure a super low resistance, a stronger spark, and better RFI noise suppression for overall efficiency.

Aside from that, the wires have positive-locking and corrosion-resistant stainless-steel terminal ends that fit securely over the spark plug to prevent separation due to vibrations when driving on bumpy roads.

Even better,

They have silicone outer jackets that are immune to gasoline, fuel, and moisture and can withstand temperatures of up to 250°C (482°F) without cracking.

Despite the fact that the coil ends on these spark plug wires aren’t as waterproof or as high-quality as factory ones, they still perform admirably for an aftermarket collection.

Key features
  • Windings with a variable pitch.
  • Color-coded and numbered.
  • Stainless steel terminal ends with a positive lock.
PROS
  • The resistance is extremely low, and the spark is extremely high.
  • Installation that is both correct and simple.
  • Terminal finishes with a tight fit.
  • High-temperature resistance is given by the silicone jacket.
CONS
  • Coil ends are not the same as those from the factory.

Why we choose this product?

The NGK RC-XX90 is our overall winner because it is a high-quality kit that guarantees a strong spark, ultra-low resistance, ease of installation, and a tight fit.

Each wire is color-coded for accurate and easy installation and is numbered for simple cylinder identification.

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Edelbrock 22716

Edelbrock 22716

The Edelbrock 22716 is a high-performance spark plug wire kit made from the highest quality materials. That is reasonably priced to ensure you get the most bang for your buck.

The spark plug wires have ultra-low resistance leads of 40 ohms, which ensures optimum EMI/RFI noise suppression.

Best of all,

The wires have a thick silicone jacket with an 8.5mm diameter. The Kevlar spiral wound core is best protected by this jacket, which keeps heat, moisture, and chemicals out.

Although these wires don’t add much horsepower, you can rest assured that they improve spark plug efficiency.

These wires are not as neat as stock ones due to their length, but this has no bearing on their efficiency.

Key features
  • Excellent value for money.
  • EMI/RFI suppression is extremely high.
  • Silicone jacket with a diameter of 8.5mm.
PROS
  • For the price, the quality and output are unrivaled.
  • Very low resistance.
  • Silicone jacket with excellent protection.
  • EMI/RFI noise reduction is excellent.
CONS
  • There is no substantial increase in horsepower.
  • Stock wires aren’t as tidy.

Why we choose this product?

The Edelbrock 22716 is a high-performance spark plug wire kit made from the highest quality materials that are also reasonably priced to ensure you get the most bang for your buck.

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ACDelco 9748GG

ACDelco 9748GG
The ACDelco 9748GG spark plug wire kit is a high-quality product with a wide range of applications. It works on over 96 percent of domestic US cars, like GM, Chrysler, and Ford, as well as imported vehicles including Toyota, Nissan, and Honda.

Aside from that,

You get a total of 8 wires, which should be sufficient for a full replacement at once. Each has a terminal design that helps to keep spark plugs in place, minimize corrosion, and make installation easier.

A high-temperature resistant silicone insulator, a boot shape for the spark plug distributor to ensure proper fit, and a coil retainer to avoid micro-arcing and fretting are among the other features.

Despite the fact that the wires are not numbered or color-coded, you can rest assured that they will be simple to install.

Key features
  • Vehicle compatibility is extensive.
  • The layout of the terminal.
  • Included is a coil retainer.
PROS
  • Many vehicles are compliant with it.
  • Better corrosion resistance and plug retention.
  • Silicone insulator that can withstand high temperatures.
  • Micro-arcing and fretting are prevented by using a coil retainer.
CONS
  • There are no numbers or colors to help you find what you’re looking for.

Why we choose this product?

The wires are designed to match the shape, fit, and function of most new vehicles, ensuring that engine output is on par or better.

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NGK RC-HE76

NGK RC-HE76

The NGK RC-HE76 spark plug wire is an excellent option if you’re looking for a reputable brand. Each wire is color-coded to make it easy to find the cylinders that go with it. Even better, they’re numbered to make setup a breeze.

Thanks to a variable pitch winding that provides ultra-low resistance, the wires also provide superior efficiency. Since there is minimal power loss along the wire, low resistance results in a strong, hot spark for effective combustion.

Even better,

They come with some top-of-the-line stainless steel terminal ends that are positive-locking and corrosion-resistant, ensuring a perfect match and superior corrosion resistance.

An oil, moisture, and petrol resistant silicone outer jacket that can withstand temperatures of up to 250°C are also included.

Key features
  • Wires that are color-coded and numbered.
  • Winding with a variable pitch.
  • Positive locking terminal ends that are corrosion resistant.
PROS
  • Wires are color-coded and numbered for ease of installation.
  • For ultra-low resistance, a variable pitch winding is used.
  • Stainless steel terminal ends that are corrosion-resistant and positive locking.
  • Silicone outer jacket that is oil, moisture, and fuel resistant.
CONS
  • Just four wires are included in the package.

Why we choose this product?

If you’re looking for a trustworthy brand, the NGK RC-HE76 spark plug wire is a great option. Each wire has a different color to help you identify the cylinders that go with it. They’re even-numbered, which makes setup a pleasure.

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JDMSPEED 10.5mm

JDMSPEED 10.5mm

The JDMSPEED 10.5mm wires have superior overall performance, making them suitable for the high demands of racing vehicles. Spiral-wound copper conductors are used in these wires to ensure ultra-low resistance and high EMI noise suppression.

Even better,

The wires have 100% silicone jackets, so you’ll never have to worry about heat or moisture damaging them. When it gets to installation, the 90-degree boots on both ends of the wires make it simple and ensure that the fit is safe.

The length of these wires appears to be the most significant disadvantage, but you should be able to neatly organize them to keep them away from stuff like the manifold.

Key features
  • Wires with a diameter of 10.5mm are high in performance.
  • Silicone insulator that is 100 percent pure.
  • Copper conductor with the spiral wound.
PROS
  • Spark plugs are given a lot of energy.
  • Conductor with low resistance.
  • The outer layer can withstand extreme temperatures.
  • Boots with a 90-degree angle on both sides.
CONS
  • The corrosion resistance of the contacts isn’t perfect.

Why we choose this product?

The JDMSPEED 10.5mm guarantees superior overall efficiency by delivering high energy to the spark plugs, making the wires suitable for racing vehicles’ high demands.

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MSD 32829

MSD 32829

The MSD 32829 has up to 40 feet of conductor wound on only 1 foot of wire, giving it one of the best EMI suppression ratings in our study of spark plug wire sets. They’re also better because they have a ferromagnetic core for efficient EMI suppression.

Another significant benefit is that the wires have a copper alloy conductor with a resistance of fewer than 50 ohms per foot, which allows for better spark plug efficiency.

Furthermore,

Other benefits provide a tough jacket that is heat and abrasion-resistant, as well as Dupont Kevlar material on the conductor core for improved tensile strength.

Stainless steel terminals with dual crimp tabs for picking the jacket and wire conductor separately are also used on the wires.

Key features
  • EMI suppression is excellent.
  • Superconductor made of copper alloy.
  • The heart is impregnated with ferromagnetic material.
PROS
  • Resistance is less than 50 ohms.
  • Tensile strength has been improved.
  • A jacket that is heat and abrasion-resistant.
  • Stainless steel terminals are powerful and long-lasting.
CONS
  • Wires that are longer than factory wires.

Why we choose this product?

It provides a tough jacket that is heat and abrasion-resistant, as well as Dupont Kevlar material on the conductor core for enhanced tensile strength.

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ACDelco 9748HH

ACDelco 9748HH

A highly qualified spark plug wire kit, such as the ACDelco 9748HH, can never go wrong because you know you’ll get excellent spark plug efficiency and durability.

These high-quality wires have the ideal conductor, weight, and diameter to provide optimum power distribution while still protecting your spark plugs.

Additionally,

With the spark plug distributor boot form and high-quality materials, you can count on a great fit and simple installation every time. They also have a waterproof seal.

The terminal design of these wires is also noteworthy, as it increases spark plug stability and provides excellent corrosion resistance.

Key features
  • High-end fabrics and design.
  • Waterproof seal and perfect match.
  • Spark plug durability has improved.
PROS
  • Spark distribution and security to the max.
  • It’s easy to put together and fits perfectly.
  • Outstanding resistance to corrosion.
CONS
  • There are no color-coded wires.

Why we choose this product?

ACDelco 9748HH with a high-quality spark plug wire gives you incredible spark plug performance and reliability. The wires’ terminal design improves spark plug efficiency and impact protection.

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Motorcraft WR5934

Motorcraft WR5934

With minimal losses, the Motor craft WR5934 spark plug wire kit provides full voltage from the distributor to the spark plug.

As a result, the wires ensure that the engine performs at its best while also reducing the risk of misfiring. Overall, the engine’s lifetime is extended as a result of this.

Moreover, The wires have been checked to meet OE standards, so you can rely on them to be reliable and durable even under the most severe conditions.

They also have a wire set boot and connector configuration for optimal efficiency.

The parts are not numbered or color-coded for ease of installation, but you do get 8 wires, which are perfect for an 8-cylinder engine, so you should be fine.

Key features
  • Spark plug voltage delivery maximum.
  • OE requirements were met during testing.
  • Removes the possibility of a misfire.
PROS
  • Reliability and longevity are up to OE standards.
  • Design of the wire collection boot and connector.
  • Protects malfunctions and extends the life of the engine.
CONS
  • There are no numbers or colors to help you find what you’re looking for.

Why we choose this product?

These are wires for high-voltage spark plugs. The Motor craft WR5934 spark plug wire package delivers maximum voltage from the distributor to the spark plug with minimal losses. They also extend the life of the engine and avoid misfires.

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Denso 671-8062

Denso 671-8062

Denso 671-8062 spark plug wires are OEM-quality replacements that look and work exactly like production plant devices. As a result, you can be certain that they will work as well as, if not greater than, the factory wires.

Aside from that,

The silicone jackets on the 8-piece spark plug wire package are classified class E. These greater jackets can tolerate chemicals, humidity, warmth, and cold (from -40 to 428°F).

They also have similar OE end caps, making installation simple, and they fit snugly into place, avoiding isolation when driving.

Although, the wires are not numbered or color-coded for easy alignment or cylinder recognition. However, most drivers should still be able to work things out.

Key features
  • Established to achieve OEM specifications.
  • Jackets with a Class E rating.
  • End caps with a snug fit.
PROS
  • Wires of good quality.
  • Jackets that are both high-quality and defensive.
  • It’s just the right amount of tightness and a natural match.
  • It’s easy to set up.
CONS
  • There are no numbers or colors to help you find what you’re looking for.

Why we choose this product?

They have similar OE end caps, making installation a breeze, and they fit snugly into place to prevent separation when driving.

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Buyer Guide

1. Spark Plug Wire Set Form

• The resistance that is dispersed Spark Plug Wire:

This form of spark plug wire is made up of very fine fiberglass wires bound together with carbon. Carbon provides them with a high level of resistance, which helps to reduce radio frequency interference. These wires are suitable for the majority of American automobiles.

• Plug Wire with Inductance:

Mostly used in Japanese automobiles. A copper-alloy or nickel alloy wire is wrapped around a spiral core of these types. The magnetic effect created by the winding reduces RFI.

Furthermore, Since they have a low resistance, only a small amount of current is required to power the spark plugs when the engine is started.

• Fixed Resistor Spark Plug Wire:

This is the kind that most European car manufacturers use as usual. Steel or copper wires are used, as well as plug-boots with resistors inside.

2. Reliability

Until purchasing spark plug wires, make sure they are compatible. Spark plugs and wires come in a variety of shapes and sizes.

Each wire collection is made to suit a particular range of spark plugs, so make sure you get the right one for your vehicle.

Universal ones, such as the ACDelco 9748GG, are often the best option since they can be used on almost any car.

3. The company’s brand

Another important consideration is the brand. Sticking with trustworthy brands like ACDelco and NGK, as with most other vehicle replacement components, is always a good idea.

When you buy from these reputable companies, you’re more likely to get high-quality wires that match perfectly. Because these companies offer assurances and warranties for their goods.

4. Compatibility

Until purchasing spark plug wires, make sure they are compatible. Spark plugs and wires come in a variety of shapes and sizes.

Each wire collection is made to suit a particular range of spark plugs, so make sure you get the right one for your vehicle.

Universal ones, such as the ACDelco 9748GG, are often the best option since they can be used on almost any car.


F.A.Q

Can it make a difference if the spark plug wires are thicker?
Spark plugs are fired with very high voltage and low amperage, necessitating thicker conductors to accommodate more amps. The thicker wires do have stronger insulation, which is normally silicone, which can withstand the heat of the engine compartment as well as the higher voltage from modern ignition systems.
Spark plug wires last for how long?
A car’s ignition cables are designed to last for around 60,000 miles before needing to be replaced. The wires can need to be replaced in some cases because the rubber boots on the end have become damaged, preventing a good connection with the spark plugs.
Is there a correct method for connecting wires?
To ensure that your engine starts properly, make sure the wires are routed correctly to the right spark plug. A misrouted wire may cause an engine misfire, which is irritating, noisy, and startling. The wires will be numbered or color-coded to assist you in determining the correct order.
Is it necessary to replace the spark plug wires on a regular basis?
Every 30,000 to 50,000 miles, we suggest replacing your spark plug wires. This, however, is dependent on the type of driving you want to do. However, if you race cars or take your vehicle off-road, you should consider replacing the wires earlier rather than later.
How do I know if a spark plug wire is faulty?
A rough idle, charring on the end of the wire that attaches to the plugs, a large drop in fuel economy or trouble starting your engine are all indicators that your spark plug wires need to be replaced.

Conclusion: By ensuring that enough voltage enters the spark plug for powerful firing, a good spark plug wire can dramatically improve an engine’s efficiency. With that in mind, the brands listed in this article are among the best on the market and should be able to provide you with a great collection for your car.

As a result, The NGK RC-XX90 is our top overall recommendation from this list because it provides high voltage, ultra-low resistance, and is simple to use. The Edelbrock 22716, on the other hand, provides the best value for money, as it is difficult to find something better for that price.

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