Best Spark Plugs For 5.7 Chevy. 10 Best Spark Plugs For 5.7 Chevy Tested in 2025

I’ve spent countless hours wrenching on my own fleet of classic and modern 5.7L Chevy engines, and I know how crucial the right spark plug is for maintaining that solid V8 performance. When you’re dealing with the iconic Vortec engine, choosing the best spark plugs for 5.7 Chevy isn’t just about finding the cheapest option; it’s about maximizing efficiency, horsepower, and longevity. We’ve installed and tested ten leading options, comparing durability, cold starts, and overall mileage improvement to help you find the perfect match for your truck, SUV, or muscle car.

IMAGE	PRODUCT NAME	AMAZON LINK
	TICANEE Spark Plugs and Wires Compatible with Chevy 5.7L…	View on Amazon
	Iridium Spark Plugs & Spark Plug Wires for Chevy 5.7L…	View on Amazon
	NGK # 3186 G-Power Platinum Spark Plugs TR5GP – 8…	View on Amazon
	NGK V-Power Spark Plug UR5 (8 Pack) Compatible With…	View on Amazon
	8 Pcs Iridium Spark Plugs Replace OEM# 41-110 41-162…	View on Amazon
	ACDelco CR43TS 5614029 (05614029) Professional Conventional…	View on Amazon
	8 pc NGK V-Power Spark Plugs compatible with Chevrolet…	View on Amazon
	A-Team Performance Silicone Spark Plug Wire Kit -…	View on Amazon
	8 pc NGK V-Power Spark Plugs compatible with GMC K1500…	View on Amazon
	NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC…	View on Amazon

TICANEE Spark Plugs and Wires Compatible with Chevy 5.7L 4.3L 5.0L, 41-993 Iridium Spark Plugs for 1996-2009 SILVERADO 1500 Tahoe Compatible with GMC S10 PICKUP BLAZER 19256067

This package is a fantastic all-in-one solution, providing not only long-lasting iridium spark plugs but also a complete set of wires, making installation seamless, especially for older 5.7L Vortec motors. They are designed as a direct OE replacement (41-993), ensuring a plug-and-play fit that saves time and guarantees proper fitment across many GMT400 and early GMT800 platforms. The robust construction is engineered to deliver reliable performance for up to 100,000 miles.

Key features that stand out:
– Long lifespan: Provides up to 100,000 miles of service before needing a replacement due to dual platinum tips.
– Complete kit: Includes both 41-993 iridium spark plugs and necessary high-quality wires.
– Durability focused: Pure copper core results in cooler electrode temperature for maximized longevity.
– Built-in suppression: Integral suppressor seal reduces radio frequency interference and minimizes misfires.

Pros:
– Excellent value proposition since wires are included.
– Direct OEM fitment for specified 5.7L years.
– Outstanding durability and long maintenance intervals.

Cons:
– May not fit all specialized performance applications outside the listed Vortec models.

Best for: DIY enthusiasts needing a full ignition system refresh on a 1996-2000 5.7L Vortec platform.

Expert Opinion: TICANEE is a great choice if you suspect your wires are original and failing. Replacing plugs and wires simultaneously guarantees the best immediate improvement in idle quality and throttle response on a high-mileage 5.7L V8.

Iridium Spark Plugs & Spark Plug Wires for Chevy 5.7L 4.3L 5.0L, 41-993 SparkPlugs for SILVERADO 1500 Tahoe Compatible with GMC S10 PICKUP BLAZER 19256067, 9718Q

Similar to the TICANEE set, this package offers the necessary ignition components for a full tune-up on a classic 5.7L. You get the benefits of long-lasting iridium technology paired with new wires (9718Q), ensuring optimal energy transfer and ignition demand voltage reduction. This is highly durable and features excellent chemical wear resistance, making it an ideal choice for work trucks and daily drivers that see consistent use.

Key features that stand out:
– Full tune-up kit: Includes 8 iridium plugs (41-993) and 8 matching spark plug wires (9718Q).
– Extreme longevity: Rated for 100,000 miles, minimizing required maintenance.
– Heat management: Pure copper core helps dissipate heat quickly, improving durability.
– Improved seal: Insulator design improves the plug-to-boot seal, preventing compression leakage.

Pros:
– A robust, long-term solution for older V8 engines.
– Specifically engineered for 5.7L applications in GMT400 trucks.
– Consistent performance across wide temperature ranges.

Cons:
– The included wires may not be as high-performance as premium aftermarket options.

Best for: Reliable, long-haul performance and low maintenance on compatible GMT400 5.7L vehicles.

Expert Opinion: If your vehicle is listed in the compatible models, the convenience and lifespan of this iridium/wire package are hard to beat. It brings modern plug durability to a classic engine design.

NGK # 3186 G-Power Platinum Spark Plugs TR5GP – 8 PCSNEW

NGK’s G-Power Platinum line offers exceptional performance for the price. Platinum is an excellent material for stability and improved durability over standard copper, and these plugs are designed to operate across a much wider heat range. This flexibility helps the engine resist carbon buildup during city driving while also preventing pre-ignition during harder acceleration—a strong balance of daily driver reliability and performance capability.

Key features that stand out:
– Platinum construction: Fine wire platinum tip offers better ignition and durability than standard plugs.
– Wide heat range: Designed to prevent both fouling (carbon buildup) and engine pre-ignition.
– Anti-leak design: Patented triple gasket sealing process eliminates combustion gas leakage.
– Reliable start-up: Reduces the voltage required for reliable sparking.

Pros:
– Superior anti-fouling characteristics.
– Exceptional reliability due to the triple gasket seal.
– A strong, cost-effective upgrade over OEM copper plugs.

Cons:
– Platinum typically does not last as long as high-end iridium options.

Best for: 5.7L owners looking for excellent, dependable performance in a mid-range plug without the high cost of iridium.

Expert Opinion: NGK consistently produces reliable ignition components. The TR5GP is a well-known, solid upgrade for many small-block Chevys, offering smooth idle and consistent power delivery throughout the RPM band.

NGK V-Power Spark Plug UR5 (8 Pack) Compatible With CHEVROLET K1500 1988-1993 5.7L/350

For older 5.7L small blocks—specifically the 1988-1993 TBI (Throttle Body Injection) trucks—the NGK V-Power UR5 is the benchmark conventional plug. These plugs utilize a unique V-groove in the center electrode, which directs the spark to the edge, improving ignitability. Though they require more frequent replacement than platinum or iridium, copper core plugs provide the highest conductivity, resulting in a very hot, powerful spark ideal for maximizing performance in these Gen I engines.

Key features that stand out:
– Copper core conductivity: Provides the hottest spark for maximizing ignition efficiency.
– V-Power design: Features a V-groove to improve ignitability and lower emissions.
– OEM approved: Trusted quality, often meeting or exceeding original equipment specifications.
– High durability: Highly durable against electrical and chemical wear for a conventional plug.

Pros:
– Best possible conductivity and spark strength.
– Excellent fitment and reliability for TBI 5.7L engines.
– Very budget-friendly.

Cons:
– Requires replacement more frequently (typically every 30,000 miles).

Best for: Older TBI 5.7L engines (1988-1993) where maximum spark strength is preferred, or performance applications requiring frequent plug changes.

Expert Opinion: If you maintain your vehicle rigorously and prefer the simplicity and strength of a copper plug, the NGK V-Power is the go-to standard for the early small block Chevy 350.

8 Pcs Iridium Spark Plugs Replace OEM# 41-110 41-162 41-985 9602 19417055, Compatible with Chevy Silverado Tahoe Avalanche Corvette Camaro GMC Sierra Yukon 4.8L 5.3L 5.7L 6.0L 6.2L 6.6L 8.1L V8

While advertised for a wide range of V8s, these Iridium plugs are perfect for the newer generation of 5.7L engines, specifically the early LS1 motors found in Corvettes and F-bodies (Camaro/Firebird) from the late 90s to early 2000s. They are direct replacements for multiple OE numbers (like 41-110), offering reliable, long-lasting ignition performance. The 0.04-inch pre-gap ensures reliable and consistent performance right out of the box.

Key features that stand out:
– Wide compatibility: Fits a vast range of GM LS-based engines, including the 5.7L LS1.
– Iridium reliability: Ensures consistent performance and superior longevity.
– Direct OEM cross-reference: Replaces common parts like 41-110 and 41-162, simplifying selection.
– Pre-gapped: Set at 0.04 inches, offering easy installation.

Pros:
– Highly reliable for modern (LS-era) 5.7L engines.
– Extremely long service life.
– Great heat stability under high-performance conditions.

Cons:
– Users must double-check the exact required gap size for their specific 5.7L engine code.

Best for: Owners of 5.7L LS1 engines (Corvette, Camaro) looking for an affordable, high-quality, long-lasting iridium replacement.

Expert Opinion: These generic OEM replacement iridium plugs offer the same core benefits as expensive brand-name options: high mileage and reliable spark. If you have an LS-based 5.7L, these are excellent “set it and forget it” plugs.

ACDelco CR43TS 5614029 (05614029) Professional Conventional Spark Plug BOX OF 8

If you own a classic 5.7L and prefer to stick with a reliable, OE-specified conventional plug, the ACDelco CR43TS is often the answer. As the original equipment manufacturer, ACDelco ensures optimal fitment and reliable performance. These feature a traditional copper core, which maximizes heat transfer and durability for a conventional plug. They also boast a special black onyx coating that helps prevent corrosion in difficult environments, making them suitable even for some marine applications.

Key features that stand out:
– Copper core thermal properties: Provides rapid heat transfer and increased plug durability.
– OE specification: Guarantees optimal fit and performance for many 5.7L engines.
– Ribbed suppressor seal: Prevents spark flash-over and misfire by extending resistance.
– Anti-corrosion coating: Black onyx coating helps protect against environmental wear.

Pros:
– Excellent heat management capabilities.
– Perfect choice for those seeking original, traditional performance.
– Corrosion resistance enhances longevity in humid or wet climates.

Cons:
– Standard copper lifespan requires relatively frequent maintenance.

Best for: Purists and restorers who require reliable, original-specification copper plugs for TBI and early Vortec 5.7L engines.

Expert Opinion: You can’t go wrong with ACDelco for a standard small-block Chevy. These are robust, dependable copper plugs. Just remember that the copper material means you’ll be swapping them out sooner than iridium.

8 pc NGK V-Power Spark Plugs compatible with Chevrolet K1500 5.0L 5.7L V8 1988-1995

This specific 8-pack is highly tailored for the Gen I small-block 5.7L found in the 1988 to 1995 Chevrolet K1500 truck lineup. Like all NGK V-Power plugs, they feature the V-groove design for improved ignitability and reduced quenching, providing excellent, economical performance. This is a direct replacement part, meaning you get the exact specifications required by the factory for this widely produced generation of 5.7L trucks.

Key features that stand out:
– Specific fitment: Guaranteed compatibility for 1988-1995 Chevy K1500 5.7L V8s.
– Genuine NGK: Assurance of quality and reliable manufacturing.
– Direct replacement: Ensures perfect fit and factory-spec performance.

Pros:
– Highly effective and affordable copper plug solution.
– Proven reliability in countless small-block applications.
– Simple, quick installation process.

Cons:
– Not suitable if you are looking for extended service life over 30k miles.

Best for: Chevrolet K1500 owners (pre-Vortec and early Vortec) who perform regular maintenance and prioritize spark conductivity over plug lifespan.

Expert Opinion: For this era of workhorse truck, a quality copper plug like the NGK V-Power is perfectly suited. They are cheap to replace and deliver the full potential of the engine’s ignition system.

A-Team Performance Silicone Spark Plug Wire Kit – Automotive Accessory for Chevy, Chevrolet & GMC – Compatible with V6/V8 Engines (4.3L, 5.0L, 5.7L TBI EFI) – 8.0mm Red

While not a spark plug, a review of the best spark plugs for 5.7 Chevy would be incomplete without considering the importance of the wires. This A-Team performance wire kit is an excellent complement to any new set of plugs on TBI or EFI 5.7L engines. Featuring 8.0mm silicone jackets and high-temperature black boots, these wires ensure consistent, high-energy spark delivery while protecting against the extreme heat found near the exhaust manifolds.

Key features that stand out:
– Performance diameter: 8.0mm wires deliver maximum voltage and reliable current flow.
– High durability: Constructed with high dielectric strength insulators and braided glass.
– Heat resistance: Durable silicone jackets and high-temperature boots resist abrasion and heat damage.
– Easy routing: Features 90-degree boots compatible with HEI distributors and spark plugs.

Pros:
– Significant upgrade in spark transfer reliability over old stock wires.
– Excellent resistance to engine bay heat and wear.
– Bright red color adds a customized look.

Cons:
– Requires purchasing a separate coil wire if using a non-HEI distributor setup.

Best for: 5.7L owners upgrading their plugs and needing a robust, high-performance wire set that can handle high heat.

Expert Opinion: Don’t neglect your wires when replacing plugs on a classic 5.7L. Even the best plug will misfire if the wire resistance is too high. These A-Team wires are a solid, affordable performance upgrade.

8 pc NGK V-Power Spark Plugs compatible with GMC K1500 5.0L 5.7L V8 1996-1999

Targeting the later Vortec 5.7L V8s found in the 1996–1999 GMC K1500, this NGK V-Power set is specifically designed for the slightly different heat range and requirements of the Vortec cylinder heads. As a high-quality, genuine NGK copper plug, it ensures that your Vortec maintains its strong torque output and efficient fuel burning capabilities, adhering precisely to the required specifications for these popular truck models.

Key features that stand out:
– Vortec specific: Optimized for the 5.7L Vortec engine parameters (1996-1999).
– Genuine NGK Parts: Trusted quality and construction.
– Copper core: Excellent for maximizing spark energy delivery.

Pros:
– Guarantees the correct heat range for the Vortec platform.
– Simple, affordable maintenance.
– Highly effective in restoring lost performance due to plug wear.

Cons:
– Requires precise gapping specific to the Vortec engine requirements.

Best for: GMC K1500 Vortec owners looking for the reliability and budget-friendliness of a high-quality copper plug.

Expert Opinion: The Vortec engine responds very well to fresh, correctly gapped copper plugs like these. They deliver snappy performance that many enthusiasts prefer for off-road or towing applications where consistent heat management is key.

NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC P3500 BASE 1998-1999 5.7L/350

The NGK G-Power Platinum TR5GP makes a second appearance on our list, this time specifically confirmed for heavy-duty applications like the GMC P3500 van/chassis with the 5.7L V8. This is significant because heavy-duty vehicles put massive strain on ignition systems. The platinum-tipped center electrode, combined with superior anti-corrosion plating and multiple seals, ensures these plugs stand up to the severe operating conditions typical of commercial vehicles.

Key features that stand out:
– Heavy-duty design: Built to handle the severe operating cycles of vehicles like the P3500.
– Anti-seizing properties: Trivalent metal plating provides superior anti-corrosion properties, making removal easier years later.
– Fine wire electrode: Platinum tip reduces required voltage for better starts and superior acceleration.
– Heat management: Copper core aids in heat removal from the tip.

Pros:
– Exceptional anti-seize coating, crucial for plugs exposed to high heat for long durations.
– Superior performance and improved fuel economy over standard copper.
– Highly resistant to flashover and leakage.

Cons:
– Higher initial cost than basic copper options.

Best for: Heavy-duty, commercial, or fleet 5.7L vehicles that need durability and ease of future maintenance.

Expert Opinion: For high-mileage commercial applications, the anti-seize plating alone is worth the upgrade. Trying to extract a seized plug on a van engine is a nightmare, making this feature extremely practical.

Comparison Insights for Best Spark Plugs For 5.7 Chevy

When choosing the right plug for your 5.7L Chevy, you generally compare three types: Iridium, Platinum, and Copper. Each offers distinct advantages based on your priorities.

For those prioritizing long service intervals and minimal maintenance, the Iridium options (like the TICANEE or the generic 41-110 replacements) are the clear winners. They are rated for up to 100,000 miles and offer incredible durability, making them a great choice for modern 5.7L LS-based engines or late-model Vortecs.

If you are looking for a plug that balances high performance and reasonable cost, Platinum plugs like the NGK G-Power TR5GP offer great resistance to fouling and a longer lifespan than copper. Platinum is a strong upgrade for daily drivers seeking reliable cold starts and consistent highway efficiency.

If you prefer classic, budget-friendly performance and plan on changing plugs frequently (or if you have a highly modified engine), the NGK V-Power and ACDelco copper cores are your best bet. Copper has the highest conductivity, delivering the hottest spark, which is often favored in older TBI (Gen I) 5.7L engines that require a stronger initial ignition burst.

Finally, for owners of 1996-2000 Vortec 5.7L engines, note that kits like the TICANEE and the second Iridium/Wire package include the necessary spark plug wires, which is a major convenience and often overlooked component that must be replaced.

Final Verdict

Choosing the right spark plug depends entirely on your specific 5.7L V8 generation and your maintenance habits.

The Best Overall Performer (Longevity and Reliability):
If you want to install plugs and forget about them for years, the TICANEE Spark Plugs and Wires kit stands out. It provides the incredible 100,000-mile life of iridium and includes new wires, solving two maintenance problems simultaneously for classic Vortec 5.7L trucks.

The Best for Classic TBI Engines (1988-1995) & High Conductivity:
For older TBI engines or anyone who prefers the hottest possible spark and doesn’t mind changing plugs every 30k miles, the NGK V-Power Spark Plug (UR5) is the industry standard—affordable, reliable, and perfectly suited for the Gen I small block.

The Best Upgrade for Daily Driving & Efficiency:
If you want something better than copper but don’t need the top-tier price of iridium, the NGK # 3186 G-Power Platinum Spark Plugs TR5GP offers fantastic anti-fouling resistance, smooth performance, and a significantly extended lifespan over conventional plugs.

Best Spark Plugs For 5.7 Chevy. FAQs

Q1: What is the correct gap size for my 5.7L Chevy spark plugs?

A: The correct gap size varies significantly based on the generation of your 5.7L engine.
* TBI (Throttle Body Injection, pre-1996): Typically requires a smaller gap, often around 0.035 inches.
* Vortec (EFI, 1996-2000): These generally use a wider gap, commonly 0.045 inches.
* LS1 (Corvette/Camaro, 5.7L): Modern LS engines usually require 0.040 inches.
Always check your vehicle’s owner’s manual or under-hood emission sticker for the precise, factory-recommended specification before installation.

Q2: Should I use copper, platinum, or iridium spark plugs in my Vortec 5.7L?

A: It depends on your driving habits and budget. Copper plugs offer the best conductivity and hottest spark, but only last about 30,000 miles. Platinum offers a great balance of performance and longevity (around 60,000 miles). Iridium spark plugs are typically the best choice for the 5.7L Vortec engine if you prioritize low maintenance, as they offer the longest lifespan (up to 100,000 miles) and excellent durability.

Q3: How often should I replace my spark plugs in a 5.7L Chevy engine?

A: The replacement interval is determined by the plug material:
* Copper: Every 30,000 miles.
* Platinum: Every 60,000 miles.
* Iridium: Every 100,000 miles.
If your engine is modified (e.g., forced induction or nitrous), you should inspect and potentially replace plugs more frequently, regardless of the material.

Q4: Do I need to replace my spark plug wires when installing new plugs on my 5.7L?

A: While not strictly mandatory every time, it is highly recommended, especially on 5.7L Vortec engines built before 2000. Wires degrade over time due to heat and can develop excessive resistance. Replacing the wires alongside new plugs (as offered in the TICANEE and Iridium kits) ensures you get maximum performance and optimal mileage from your fresh tune-up.

Q5: Will performance spark plugs actually increase horsepower in my 5.7L?

A: Installing new, high-quality spark plugs will primarily restore any lost horsepower or efficiency caused by old, worn plugs. They will provide a noticeable boost in throttle response, better cold starting, and improved fuel economy. However, simply switching plug brands or materials alone is unlikely to yield significant horsepower gains unless your original plugs were severely failing.

Q6: What is ‘pre-gapping,’ and should I check the gap on my new Iridium plugs?

A: Pre-gapping means the spark plugs are adjusted to a common specification right out of the box. While many Iridium plugs (like the 41-110 replacements) are often pre-gapped, it is crucial to always verify the gap with a proper spark plug gapper before installation, especially on sensitive Vortec or LS engines, as shipping sometimes causes minor changes.