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Best Spark Plugs For 350 Chevy Engine (2024 Updated)

If you're looking for an optimal performance from your 350 Chevy engine, spark plugs are a critical aspect you can't afford to overlook. These tiny components deliver electric current through the ignition system, and if they're not in perfect condition, you risk losing power or even damaging the motor. A perfect set of spark plugs promises a smooth ignition, ensuring your vehicle runs perfectly under any condition. Here are the essential factors you should consider before buying spark plugs for a 350 Chevy engine.

Firstly, you need to identify the best fit for your vehicle. There are different sizes and shapes available in the market, and you must purchase one that is appropriate for your Chevy engine. Secondly, the design and construction of the spark plug play a significant role in its functionality. You'll notice that different materials and designs are used depending on the brand and model. Lastly, you must consider the reviews and recommendations available online. You want to purchase from a reputable source that provides genuine products and has a positive history of customer service.

Do you want to experience a smoother ride and optimal performance from your 350 Chevy engine? Could your vehicle need a spark plug makeover? Are you uncertain about what factors to consider before investing in these components? If so, this article is for you! Read on to discover crucial tips and tricks that will help you navigate the complex spark plug market without breaking the bank.

10 Best Spark Plugs For 350 Chevy Engine

# Product Image Product Name Product Notes Check Price
1
It is ideal for high performance ignition in Chevy engines, including small and big blocks with HEI distributors.
2
The product is ideal for igniting Chevy Small Block and Big Block engines with HEI type distributors.
3
This product is ideal for small block Chevy engines in Chevrolet, GMC, and other similar vehicles.
4
This spark plug is ideal for a Chevrolet P20 from 1976-1984 with a 5.7L/350 engine.
5
It is ideal for improving the performance of electronic small block and big block Chevy engines.
6
The product is ideal for replacing spark plug wires in Chevy/GM vehicles with a SBC engine produced from 1974-1988.
7
This product is ideal for improving ignition performance of various Chevy engines with V8 configurations.
8
It is ideal for improving the ignition performance of GM 305 and 350 engines in select Chevrolet and Pontiac models.
9
This product is ideal for replacing ignition coil packs and spark plugs in certain models of Chevy, GMC, and Isuzu vehicles.
10
This product is ideal for improving the performance of Chevrolet small block engines with multiple compatible models.
It is ideal for high performance ignition in Chevy engines, including small and big blocks with HEI distributors.
The product is ideal for igniting Chevy Small Block and Big Block engines with HEI type distributors.
This product is ideal for small block Chevy engines in Chevrolet, GMC, and other similar vehicles.
This spark plug is ideal for a Chevrolet P20 from 1976-1984 with a 5.7L/350 engine.
It is ideal for improving the performance of electronic small block and big block Chevy engines.
The product is ideal for replacing spark plug wires in Chevy/GM vehicles with a SBC engine produced from 1974-1988.
This product is ideal for improving ignition performance of various Chevy engines with V8 configurations.
It is ideal for improving the ignition performance of GM 305 and 350 engines in select Chevrolet and Pontiac models.
This product is ideal for replacing ignition coil packs and spark plugs in certain models of Chevy, GMC, and Isuzu vehicles.
This product is ideal for improving the performance of Chevrolet small block engines with multiple compatible models.

1. High-Performance Spark Wires For Gm Engines

The 10.5mm Red Spark Plug Wire Set is a high-performance racing spark plug wire set that includes 9 pieces, with 8 for the spark plugs and 1 for the coil. These wires, also known as high tension leads, transfer high voltage pulses that ignite the air and fuel mixture for combustion in the engine. The wires are compatible replacements for Chevrolet & GM SBC & BBC engines, fitting HEI (High Electronic Ignition) systems with Small Block and Big Block engines, including SBC 302, 305, 307, 327, 350, 400, BBC 348, 366, 396, 402, 409, 427, 454, 496, 502, 572, 632 engines with V8 4.9L, 5.0L, 5.4L, 5.7L, 6.6L, 6.5L, 6.7L, 7.0L, 7.4L, 8.1L, 8.2L, 9.4L and 10.4L displacements.

This spark plug wire set is composed of 10.5mm thick wires, which are thicker and longer than OEM wires, and feature a red color, providing a racing style look to your engine while delivering the highest possible voltage spark for maximum performance, torque, and horsepower without interfering with radio frequency. The wires are made of high di-electric insulator and heavy glass braid wrapped in heavy-duty silicone jackets and high-performance black boots, making them capable of withstanding extremely high temperatures and excessive abrasion for a long period of time.

While this spark plug wire set is not a genuine OEM part, it is a direct replacement for the factory spark plug wires and delivers the same or even better performance than OEM. If you are experiencing misfires, hard starting, rough idle, hesitation, and poor fuel economy, replacing your spark plug wires with this high-quality set from AA Ignition can help resolve these issues.

AA Ignition stands behind the quality of their spark plug wire set and offers a lifetime warranty. If the part ever fails on your small block or big block engine build, simply contact them for a replacement.

Pros

  • Thick and long wires provide maximum performance, torque, and horsepower.
  • High-quality construction with heavy glass braid wrapped in heavy-duty silicone jackets and high-performance black boots.
  • Direct replacement for factory spark plug wires.
  • Lifetime warranty from AA Ignition.

Cons

  • – May not be compatible with all engine types.

2. Gm08 Ignition Combo Kit For Chevy V8

Ensure that this Distributor and Spark Plug Wires Ignition Combo Kit is compatible with your vehicle by checking the fitment information before making a purchase. This kit is designed to work with Chevy SBC 350 and BBC 454 engines. The manufacturer part numbers for this kit are DD-SBC-HEI-V8, 850001R, 8362, 850001-2, D100, 850002, D1001, GM08, 93440806, 66941R, 66941BK, D1051, 640000, and D1002.

This combo kit features electronic module components that are computer tested before and after assembly, ensuring reliable performance. It is 100% compatible with OEM parts and meets Original Equipment Manufacturer (OEM) standards.

Pros

  • Designed to work with Chevy SBC 350 and BBC 454 engines
  • Electronic module components are computer tested before and after assembly
  • 100% compatible with OEM parts
  • Meets Original Equipment Manufacturer (OEM) standards

3. Small Block Chevy Tune-Up Kit

The Ready 2 Run R2R Small Red Cap Distributor Coil and Red 8mm Spark Plug Wires Set Under The Exhaust Kit is the perfect ignition upgrade for SBC Small Block Chevy Chevrolet GMC 283 305 307 327 350 400 engines. The complete Ready-to-Run-Distributor comes with an adjustable mechanical advance which lets you customize the ignition curve according to your engine's requirements for maximum performance. This kit is designed to provide stability and endurance to your engine's ignition system. It features an over-sized steel shaft that rotates in a top-mounted sealed ball bearing, while an extra-long sintered bushing guides the shaft at the base of the housing. This design ensures that the distributor will last long and perform consistently.

The Silicone Spark Plug Wires Set included in the kit has a black 90-degree boot for the HEI distributor and another black 90-degree boot for the spark plug. This wire kit is designed for Coil-in-Cap "HEI" Design System which does not utilize an external coil wire, thus reducing the chances of failure. The wire set is made from high-quality silicone which ensures that it can withstand high temperatures and last long. The kit comes with a one-year warranty, which is a testament to the quality of this product.

Pros

  • Adjustable mechanical advance allows you to customize the ignition curve according to your engine's needs for maximum performance.
  • Over-sized steel shaft and extra-long sintered bushing provide stability and endurance to the ignition system.
  • Silicone Spark Plug Wires Set is made from high-quality silicone which can withstand high temperatures and last long.
  • One-year warranty provided with the kit ensures the quality of the product.

4. Ngk V Power Spark Plug Ur4 (8 Pack) For Chevrolet P20 1976-1984 5.7l/350

Upgrade your vehicle's performance with the powerful V8 Engine of 5.7L/350 size, equipped with a Chevy small block Gen I family. The engine is designed to provide excellent power and acceleration to your vehicle, allowing you to experience an exhilarating driving experience. The spark plug features a nickel alloy electrode tip material and a copper electrode core material, ensuring optimal performance and durability.

The spark plug has a manufacturer heat range of 4, and an insulator type of projected, making it ideal for high-performance applications. It has a spark plug thread size of 14mm and a spark plug reach of 0.460 in, with a tapered spark plug seat style and a wrench diameter of 5/8 in. The spark plug also features a ground strap quantity of one, ensuring reliable and consistent ignition.

This product is sold in a convenient 8-pack, making it easy to replace all the spark plugs in your vehicle. Upgrade your vehicle's performance with these high-quality spark plugs and experience the difference in power and acceleration.

Pros

  • Powerful V8 Engine provides excellent performance and acceleration
  • Spark plug features nickel alloy electrode tip material and copper electrode core material for optimal performance and durability
  • Manufacturer heat range of 4, ideal for high-performance applications
  • Convenient 8-pack for easy replacement of all spark plugs

5. 10.5 Mm High Performance Spark Plug Wire Set For Hei Sbc Bbc 350 383 454 Electronic (9pcs)

Upgrade your vehicle's ignition system with these high-performance racing spark plug wires. Designed to fit both SBC and BBC Chevrolet engines, this universal set features 10.5mm wires with 90-degree boots on both ends for easy installation. With these electronic ignition HEI plug wires, you'll get more spark to your plugs resulting in better engine performance.

These wires are equipped with a high-temperature 100% pure silicone insulator outer layer that ensures longevity and durability. The silicone material also provides excellent heat resistance, ensuring that the wires will not melt or burn even under extreme conditions. The 10.5mm diameter of these wires also ensures consistent spark delivery, allowing for optimal engine performance.

This set of spark plug wires is a must-have for any car enthusiast looking to upgrade their ignition system. With its high-quality construction and superior performance, these wires will undoubtedly improve the overall performance of your vehicle.

Pros

  • Universal set fits both SBC and BBC Chevrolet engines for easy installation
  • 10.5mm wires with 90-degree boots provide more spark to your plugs
  • High-temperature 100% pure silicone insulator outer layer for longevity and durability
  • Silicone material provides excellent heat resistance to prevent melting or burning
  • Consistent spark delivery ensures optimal engine performance

6. High-Performance Spark Plug Wires For Chevy/gm Engines

Upgrade your engine's performance with the 9Pcs 8mm Spark Plug Wires Set Replacement for Chevy/GM 1974-1988 305 350 400 SBC Engine. This universal kit comes with heat and oil-resistant wires in blue 100% silicone boot ends, ensuring maximum durability and longevity. The double spring locking spark plug terminals provide secure connections, while the wire core is perfect for applications where RFI is not a concern.

The 64602 Hi Energy Spark Plug Wire Set is designed to fit 8-cylinder engines, delivering reliable and consistent performance. The kit includes 90º, 135º, or 180º spark plug boot ends, making it easy to install resistors or cores at the end of the spark plug cover. With its high-quality construction and versatile design, this spark plug wire set is a must-have for any serious car enthusiast.

With the 64602 High Energy 8mm Spark Plug Wires Set, you can be sure that your engine will perform at its best. This replacement set is perfect for Chevy and GM vehicles made between 1974 and 1988. It features 9 spark plug wires, each with a 90° boot spark plug wire for easy installation. Upgrade your engine's performance with this high-quality spark plug wire set today!

Pros

  • Heat and oil-resistant wires ensure maximum durability and longevity.
  • Double spring locking spark plug terminals provide secure connections.
  • Wire core is perfect for applications where RFI is not a concern.
  • Versatile design with 90º, 135º, or 180º spark plug boot ends for easy installation of resistors or cores.
  • High-quality construction delivers reliable and consistent performance.

7. Jdmon Spark Plug Wires For Chevy V8.

Upgrade your Chevy small block or big block engine with these high-performance racing spark plug wires. These 10.5mm wires are compatible with universal spark plug wire sets, and can be used on SBC engines such as the 302, 305, 307, 327, 350, and 400, as well as BBC engines such as the 348, 366, 396, 402, 409, 427, 454, 496, 502, 572, and 632. It is important to confirm your vehicle information before purchasing to ensure compatibility.

These spark plug wires feature silicone insulation technology that has a high-temperature resistance of -40 degrees to +220 degrees, and a high voltage of 25KV. The wire core is made of silicone conductor, which provides stable resistance and superior conductivity. The wire body is multi-layer reinforced, making it more durable and ensuring a longer service life.

These spark plug wires are a perfect occasional replacement and can be directly replaced with the original accessories. They are plug and play, with a blue line for easy identification. The product description below contains the length parameter for the wire harness.

Pros

  • Compatible with a wide range of Chevy small block and big block engines
  • High-performance racing spark plug wires with silicone insulation technology
  • High-temperature resistance of -40 degrees to +220 degrees and high voltage of 25KV
  • Stable resistance and superior conductivity with silicone conductor wire core
  • Multi-layer reinforced wire body for durability and longer service life
  • Plug and play with blue line for easy identification

8. Dragon Fire High-Performing Ignition Wires For Gm Engines.

The Dragon Fire Performance Sport Series Direct Factory Fit is a top-quality ignition wire set that is designed to enhance the performance of 1989-1993 Buick Chevrolet and Cadillac 5.0L 5.7L V8 engines. The wires have a 10mm diameter and 150 Ohms per foot resistance. They are made of high-performance coated copper-nickel alloy (CuNi) (3:1) conductor that ensures maximum voltage transfer and superior RFI/EMI protection.

These wires are precisely wound at 100 turns per inch (+/- 10%) to provide high voltage ignition signals to the spark plugs, resulting in improved engine performance and fuel efficiency. The wires have a kevlar core and high tensile strength fiberglass protection mesh that can withstand high temperatures of up to 600F, making them durable and long-lasting.

The ignition wires come with an extra thick boot wall design that prevents electrical leakage and arcing, ensuring a reliable and consistent spark. The Dragon Fire Performance Sport Series Direct Factory Fit ignition wires also have cylinder wires of varying lengths, including 1×27", 1×30", 1×34", 2×34.5", 1×37.5", 1×38", and 1×43". The coil wires are 1×14" and 1×24", making them easy to install and replace.

Overall, the Dragon Fire Performance Sport Series Direct Factory Fit ignition wires are a great investment for anyone looking to improve the performance of their 1989-1993 Buick Chevrolet and Cadillac 5.0L 5.7L V8 engine. These wires are designed to withstand high temperatures, provide superior RFI/EMI protection, and ensure maximum voltage transfer, resulting in improved engine performance and fuel efficiency.

Pros

  • High-performance coated copper-nickel alloy (CuNi) (3:1) conductor for maximum voltage transfer and superior RFI/EMI protection
  • Precision wound at 100 turns per inch (+/- 10%) for reliable and consistent spark
  • Kevlar core and fiberglass protection mesh can withstand high temperatures up to 600F
  • Extra thick boot wall design prevents electrical leakage and arcing

9. Canyon Coil & Plug Set For 3.5l Engines

LCWRGS Ignition Coil Pack and Spark Plugs are designed to be compatible with various vehicles such as the 2004-2006 Chevy Colorado L5 3.5L, 2004-2006 GMC Canyon L5 3.5L, 2006 Hummer H3 L5 3.5L, 2006 Isuzu i-350 L5 3.5L, and 2007-2008 Isuzu i-370 L5 3.7L. These coils and plugs are built with premium quality materials that meet or exceed OE specifications, ensuring high performance and enhanced reliability. The high conductive copper wire and high dielectric performance epoxy make for precise, corrosion-resistant connections that provide excellent electrical connectivity and ensure long service life.

These ignition coils and spark plugs replace OEM part numbers such as UF303, C1395, 5C1392, 12570616, 12568062, E255, 52-1743, GN10114, IC414, 12568062, and 19300921 for the coils and 5019 for the spark plugs. Their direct OEM design makes them easy to install and fit popular vehicles such as the 04-06 Chevy Colorado, GMC Canyon, Isuzu i-350 3.5 L5, and 07-08 Isuzu i-370 3.7 L5.

LCWRGS's ignition coils and spark plugs provide 15% more energy than OE coils, improving engine performance. The ignition coils provide the necessary spark for the engine. Over time, factory ignition coils and plugs will fail, leading to poor gas mileage, misfires, hesitation, and the check engine light (CEL) and VSC warning lights. Replacing the coils and plugs together will provide superior cold-start performance and a smoother running engine.

The package includes a set of 5 ignition coil packs and spark plugs, with a 24-month warranty. If there are any issues or problems with the ignition coils, customers can contact the seller for assistance and resolution.

Pros

  • Compatible with various vehicles
  • Built with premium quality materials that meet or exceed OE specifications
  • High conductive copper wire and high dielectric performance epoxy ensure excellent electrical connectivity and long service life
  • Direct OEM design makes for easy installation and fitting popular vehicles
  • Provides 15% more energy than OE coils, improving engine performance
  • Comes with a 24-month warranty

10. Chevy High-Performance Spark Plug Wires.

The High-temperature tolerance Spark Plug Wire Set is an exceptional product made of 100% pure silicone insulator for the outer layer, making it perfect for use in high-temperature environments. The wire set comes in black with 90 Degree Boot for HEI Distributor, and Black 90 Degree Boot for Spark Plug, making it compatible with Chevy Chevrolet GMC SBC Small Block Under the Exhaust Wires HEI 283 305 307 327 350 400.

This product is designed with high dielectric strength insulator, braided heavy glass, heavy-duty silicone jackets, and high temperature black boots that resist heat and abrasion damages, making it a durable option. It uses spiral-wound copper conductor with extremely low resistance that ensures top performance and quick installation. Moreover, the wire set uses extremely high EMI suppression, making it a reliable option for all users.

This wire set is an excellent option for those looking for high-quality spark plug wires that are both durable and reliable. With its high-temperature tolerance and compatibility with Chevy Chevrolet GMC SBC Small Block Under the Exhaust Wires HEI 283 305 307 327 350 400, it is a product that is sure to meet your needs.

Pros

  • High-temperature tolerance makes it perfect for use in high-temperature environments
  • Made of 100% pure silicone insulator for the outer layer
  • Designed with high dielectric strength insulator, braided heavy glass, heavy-duty silicone jackets, and high temperature black boots that resist heat and abrasion damages
  • Uses spiral-wound copper conductor with extremely low resistance that ensures top performance and quick installation
  • Uses extremely high EMI suppression, making it a reliable option

Best Spark Plugs For 350 Chevy Engine FAQs

Can I use platinum or iridium spark plugs in my 350 Chevy engine?

Yes, you can use platinum or iridium spark plugs in your 350 Chevy engine. Both platinum and iridium spark plugs have a longer lifespan compared to traditional copper spark plugs, which means you won't have to replace them as frequently. They also have better ignitability, which can result in improved fuel efficiency and engine performance.

However, it's important to note that not all spark plugs are created equal, and you should always consult your vehicle's owner manual or a trusted mechanic to determine which spark plugs are best for your specific make and model. Using the wrong type of spark plug can cause damage to your engine and ultimately lead to costly repairs.

Additionally, it's important to properly gap the spark plugs before installation to ensure optimal performance. This can usually be done with a spark plug gap tool, which can be purchased at most auto parts stores.

In summary, while platinum and iridium spark plugs can provide benefits for your 350 Chevy engine, it's important to do your research and consult a professional before making any changes to your vehicle's spark plugs.

How often should I replace the spark plugs in my 350 Chevy engine?

The frequency of spark plug replacement in a 350 Chevy engine is dependent on several factors such as the type of spark plugs installed, the driving conditions, and the overall maintenance of the vehicle. Generally, spark plugs should be replaced every 30,000 to 100,000 miles depending on the type of plug installed. However, it is recommended to check the owner's manual to know the manufacturer's recommended replacement mileage.

In addition, if you notice any signs of misfiring or poor engine performance such as difficulty in starting, rough idling, or a decrease in fuel efficiency, it may be time to replace the spark plugs. Regular inspection of the spark plugs can also help you determine if they need to be replaced. It is also important to ensure that the spark plugs are properly gapped and torqued to the manufacturer's specifications during installation.

Overall, regular maintenance and inspection of the spark plugs will help prolong the life of your engine and ensure optimal performance.

What are the symptoms of bad or worn spark plugs in a 350 Chevy engine?

The spark plugs play a vital role in the functioning of an engine, and when they start to wear out, it can cause several symptoms that may affect the engine's performance. In a 350 Chevy engine, the symptoms of bad or worn spark plugs may include difficulty starting the engine, misfiring, rough idling, reduced fuel economy, and a lack of acceleration.

A worn spark plug can cause a weak spark, which can lead the engine to misfire or fail to start. This can also cause rough idling, and you may observe a vibrating sensation in the vehicle. Another symptom of bad spark plugs is reduced fuel economy, as the engine may need to work harder to maintain speed, leading to an increase in fuel consumption.

A lack of acceleration can be another sign of worn spark plugs, as they may not be able to ignite the fuel mixture efficiently. If you notice any of these symptoms, it is essential to have your spark plugs checked and replaced if necessary to prevent further damage to your engine.

What is the best brand of spark plugs for a 350 Chevy engine?

When it comes to choosing the best spark plugs for a 350 Chevy engine, there are several factors to consider. The spark plugs play a crucial role in the engine's performance, and choosing the right brand can make a significant difference in terms of power, fuel efficiency, and overall engine longevity.

One of the top brands for spark plugs is NGK. NGK has been known for its high-quality spark plugs for over 80 years and is a trusted brand among car enthusiasts and mechanics alike. Their spark plugs are designed to offer superior ignition performance, durability, and reliability.

Another popular brand for spark plugs is ACDelco. ACDelco is a well-known brand in the automotive industry and is often used as a replacement part for Chevy engines. Their spark plugs are designed to meet or exceed OEM specifications and provide reliable performance.

Other top brands for spark plugs include Bosch, Denso, and Champion. Ultimately, the best brand of spark plugs for a 350 Chevy engine will depend on factors such as the engine's age, driving conditions, and personal preferences. It is always best to consult with a mechanic or do your own research before making a purchase.

What is the recommended spark plug gap for a 350 Chevy engine?

The recommended spark plug gap for a 350 Chevy engine can vary depending on the specific year and model of the engine. However, a general guideline for the spark plug gap is typically between 0.035 and 0.045 inches. It is important to note that the spark plug gap can affect the overall performance of the engine, including fuel efficiency and power output. Therefore, it is essential to follow the recommended spark plug gap for your specific engine to ensure optimal performance. It is also crucial to use high-quality spark plugs that are designed to work with your engine to avoid any potential damage or issues. Regular maintenance of your spark plugs can help to ensure that your engine is running smoothly and efficiently.

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