10 Best Spark Plug Wire Sets of 2021

NGK is one of the best spark plug wire set brands in the market because they make highly efficient units such as this RC-XX90, which have variable pitch windings that deliver an ultra-low resistance.

This results in a very powerful hot spark on the spark plug’s end because most of the voltage from the ignition coil is passed through with minimal losses. Additionally, this kind of pitch winding also results in outstanding EMI/RFI noise suppression, making it very efficient.

Other than this, the wires in this set have positive-locking and corrosion-resistant stainless-steel terminal ends, which fit tightly over the spark plug so as to resist separation due to vibrations as the car moves on bumpy roads.

More features include an oil, petrol and moisture resistant silicone outer jacket that can withstand temperatures not exceeding 250°C (482°F) without cracking, and each wire is numbered for quick cylinder identification. However, you only get 4 wires per set.

This product is packed with 8 wires for use in an 8-cylinder engine, and these have an oil-resistant insulation that can also withstand high temperatures for durability purposes.

The pieces are available in two options, which are a wire core and a resistor core. The wire core option is inferior to the resistor core because it is only usable in situations where radio frequency interference is not a big issue.

Resistor cores are better suited for the modern high ignition engines but both options are equipped with silicone boot ends and you can get them in 90°, 135° or 180° angles so that you can choose depending on the one that’s easier for you to handle.

Other features include an 8mm thick core and double spring locks at the plugs to prevent separation. However, the wires are not numbered for easy cylinder identification.

Back to NGK and though this set also contains only 4 wires, each one is color-coded for simplified, correct and easy installation. On top of this, each piece is numbered for easy cylinder identification and overall, these features make installation very easy.

The wires are also designed for superior performance, having a variable pitch winding that delivers ultra-low resistance. This results in a powerful, hot spark for effective combustion because of highly reduced losses along the wire.

Corrosion-resistant, positive locking stainless-steel terminal ends are fitted in so as to provide tight-fitting and vibration resistance, which gets rid of possible separations as you drive your car along bumpy roads.

Other features include an oil, moisture, and petrol resistant silicone outer jacket that can withstand temperatures of up to 250°C.

Toyota’s 19037-62010 is designed as an OEM replacement spark plug wire for the 1996-2002 4runner, 1994-1998 T100, 1995-2004 Tacoma and 2000-2005 Tundra, meaning that it will restore your car’s fuel-burning performance to its original state.

Even though this makes it very limited in terms of compatibility, the fact that it is made by Toyota assures you of superb quality and good performance. Because of this, the product is actually the top-rated spark plug wire set in this review.

However, the kit is quite costly, but this is justifiable based on its brand and expected performance quality.

If you are tight on cash, you can get this 6-piece spark plug wire set for your car, though it must be a GM vehicle because the pieces are designed as GM OEM parts for restoring the engine to factory performance.

That said, this 746U is well equipped for the job, featuring a fiberglass braid and carbon impregnated fiberglass core for superior electrical conductivity and strength.

Additionally, the pieces are engineered to suppress noise from electromagnetic interference (EMI) and radio frequency interference (RFI), leading to better conductivity and improved performance.

A thick silicone jacket ensures that the conductive core is protected from heat and abrasion, which are very common inside the engine compartment.

Other features include a spark plug distributor boot shape for proper fitting and installation (creates a watertight seal), and a terminal design, which is corrosion-resistant, and improves spark plug retention for non-separation as you drive on bumpy roads.

This 8-piece spark plug wire set has class E rated silicone jackets, which basically means that it has a very high-quality outer cover that can withstand chemicals, moisture, heat, and cold (from -40 to 428°F).

Other than this, the pieces are available in 7 and 8mm thickness, and they are designed to be identical in form and performance to factory-installed units for restoring the original fuel-burning performance.

Additionally, they have identical OE end caps, which means easy installation and they fit tightly into position, preventing separation as you drive. However, the wires are not numbered or color-coded for easy matching or cylinder identification.

NGK’s spark plug wire sets do stand out from the rest because of their high-quality features such as the triple crimp connector design on this 4-wire kit. This connector gives a better connection of the core between the terminal and the cable, resulting in a stronger voltage passing through.

The terminal itself is made out of stainless steel, which is highly durable and corrosion-resistant, while the core is an Aramid composite that is surrounded by a magnetic ferric layer.

This magnetic layer is then covered in a unique variable pitch winding, which creates an ultra-low resistance so as to deliver a powerful, hot spark with high RFI/EMI noise suppression.

Each of the 4 wires is numbered for easy cylinder identification, and they are also color-coded for easy, straightforward installation.

Other features include heat resistant silicone jackets that can withstand temperatures of up to 250°C or 482°F, and this same jacket is also resistant to oil, petrol, and moisture, thereby ensuring that the wire inside is firmly protected on the inside.

This WR5934 spark plug wire set from Motorcraft is designed to deliver the maximum voltage from the distributor to the spark plug with very minimal losses.

As a result, the wires ensure optimum engine performance while reducing the chances of misfiring and overall, this increases the lifespan of the engine.

The wires are actually tested to meet OE specifications, which means you should expect reliability and durability under extreme performance conditions, and they have a wire set boot plus connector design for the best performance.

However, the pieces are not numbered or color-coded for easy installation, but you get 8 wires, which are ideal for an 8-cylinder engine.

Though very expensive, this spark plug wire set has one major advantage and that is having a superconductor, which is made of an 8.5mm thick copper alloy.

This material has a resistance fewer than 50 ohms per foot, making it very efficient at transmitting high voltage from the distributor to the spark plug.

Additionally, the wire consists of a ferromagnetic impregnated core, which is very effective at choking EMI, and this core is wrapped in 40 feet of the copper alloy conductor for high EMI noise suppression.

Other features include Dupont Kevlar material on the conductor core for increased tensile strength, a tough jacket that is heat and abrasion-resistant, and stainless-steel terminals with dual crimp tabs for grabbing onto the jacket and wire conductor separately.

ACDelco’s 9748GG is designed as a widely compatible spark plug wire set that can be used on over 96% of domestic US vehicles such as GM, Chrysler, and Ford, as well as imported ones such as Toyota, Nissan, and Honda.

The wires are actually designed to match the form, fit and function on most new vehicles, which means you should expect up to par or even better engine performance once these wires are installed.

Other than this, you get a total of 8 wires and each has a terminal design that improves on spark plug retention, reduces corrosion and simplifies the installation process.

Other features include a high-temperature resistant silicone insulator, a spark plug distributor boot shape for proper fitting and a coil retainer for preventing micro-arcing and fretting. However, the wires are not numbered or color-coded for easy installation.