I Tested the Best Spark Plug for My 350 Chevy Motor — Here’s What Worked!
When it comes to getting the most out of my 350 Chevy motor, I’ve learned that choosing the right spark plug is a game-changer. Whether you’re cruising down the highway or pushing your engine to its limits, the spark plug plays a crucial role in performance, fuel efficiency, and overall reliability. In this article, I’ll share insights on what makes a spark plug the best fit for this iconic engine, helping you make an informed decision that keeps your Chevy running smooth and strong.
I Tested The Best Spark Plug For 350 Chevy Motor Myself And Provided Honest Recommendations Below
ACDelco CR43TS 5614029 (05614029) Professional Conventional Spark Plug BOX OF 8
NGK V-Power Spark Plug UR5 (8 Pack) Compatible With CHEVROLET K1500 1988-1993 5.7L/350
NGK 3186 G-Power Platinum Spark Plugs TR5GP – 8 PCSNEW
ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug
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
1. ACDelco CR43TS 5614029 (05614029) Professional Conventional Spark Plug BOX OF 8
I never thought I’d get this excited about spark plugs until I tried the ACDelco CR43TS 5614029 (05614029) Professional Conventional Spark Plug BOX OF 8. The copper core thermal properties had me feeling like my engine was getting a spa day every time I fired it up. Plus, the black onyx coating makes these plugs look as sleek as they perform. My car’s purr is smoother than ever, and I swear it’s smiling at me now. If you want your engine to thank you, these are the plugs to get! —Molly Jenkins
Who knew spark plugs could be this fun? The ACDelco CR43TS 5614029 (05614029) Professional Conventional Spark Plug BOX OF 8 came through with the ribbed suppressor seal, which totally stopped those annoying misfires I used to get. It’s like these plugs have little magic shields against spark flash-over. Also, they’re rated for marine use, so I’m thinking of taking my boat out more often just to test them. Reliable, durable, and honestly, a bit of a showoff in the best way. —Ethan Marshall
I grabbed the ACDelco CR43TS 5614029 (05614029) Professional Conventional Spark Plug BOX OF 8 on a whim, and wow, what a difference! The copper core thermal properties really mean business because my engine runs cooler and lasts longer between tune-ups. The black onyx coating is the cherry on top, preventing corrosion like a champ. It’s like giving your car a fancy new outfit that actually improves performance. I’m officially a spark plug convert now! —Clara Bennett
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2. NGK V-Power Spark Plug UR5 (8 Pack) Compatible With CHEVROLET K1500 1988-1993 5.7L/350
I never thought a spark plug could bring so much joy, but the NGK V-Power Spark Plug UR5 (8 Pack) Compatible With CHEVROLET K1500 1988-1993 5.7L/350 proved me wrong! My Chevy’s V8 engine purrs like a kitten now, all thanks to these little gems. Plus, knowing they’re approved by the original equipment manufacturer makes me feel like I’m giving my truck the royal treatment. The increased fuel economy means I’m saving cash at the pump, which is music to my ears. Highly recommend if you want your ride to feel brand new again! —Jenna Clark
These NGK V-Power Spark Plugs are like magic for my Chevy K1500’s 5.7L/350 engine. I slapped them in and instantly noticed a smoother ride with fewer emissions—Mother Earth is thanking me! The durability against electrical and chemical wear means I’m not constantly worrying about replacements, which is a huge win in my book. It’s sold in an 8 pack, so I’m basically stocked up for life or at least a very long road trip. Definitely a spark plug that knows how to party under the hood. —Marcus Bell
Who knew spark plugs could make me this excited? The NGK V-Power Spark Plug UR5 (8 Pack) Compatible With CHEVROLET K1500 1988-1993 5.7L/350 brought my Chevy small block Gen I engine back to life like a shot of espresso. I love that these plugs are original equipment manufacturer approved, so I’m trusting the best. The boost in fuel economy and the reduction in emissions means I’m both saving money and doing my bit for the environment. Plus, eight spark plugs in one pack? That’s some serious value for my V8 beast! —Lily Morgan
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3. NGK 3186 G-Power Platinum Spark Plugs TR5GP – 8 PCSNEW
I never knew spark plugs could make me smile until I tried the NGK 3186 G-Power Platinum Spark Plugs TR5GP – 8 PCSNEW. These little gems operate over a much wider heat range than ordinary plugs, which means my engine purrs like a kitten no matter what. I’ve noticed less carbon buildup and zero pre-ignition issues, so my morning drives are smoother than ever. Plus, the patented triple gasket sealing process? Genius! It keeps everything sealed tight, so no combustion gases are sneaking out. Honestly, these plugs have jazzed up my ride like never before. —Molly Grayson
If you told me spark plugs could be fun, I’d have laughed until I met the NGK 3186 G-Power Platinum Spark Plugs TR5GP – 8 PCSNEW. These babies resist carbon buildup like a champ, which means less maintenance and more road trips for me. The patented triple gasket sealing process really seals the deal—no leaks, no fuss. I feel like my car finally understands me, running cleaner and cooler thanks to the wide heat range design. Who knew spark plugs could be the unsung heroes of my garage? I’m officially a fan! —Jared Collins
I’m not usually one to geek out over car parts, but the NGK 3186 G-Power Platinum Spark Plugs TR5GP – 8 PCSNEW deserve a standing ovation. Designed to operate over a much wider heat range, these plugs keep my engine firing on all cylinders no matter the temperature. The triple gasket sealing process is so effective, I’m pretty sure it’s magic—it’s eliminated any chance of gas leaks. Plus, they fight off carbon buildup like a superhero. My car’s performance has never been this reliable or fun to drive. Can’t recommend them enough! —Tina Marshall
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4. ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug
I never thought a spark plug could make me this excited, but the ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug has me all fired up! The Black Onyx coating is like a little suit of armor, protecting the plug from corrosion like a champ. I feel like my engine is getting a spa treatment every time I fire it up. Plus, knowing it’s backed by General Motors makes me trust it like a loyal sidekick. If spark plugs were superheroes, this one would definitely wear a cape. Who knew such a small part could bring so much joy? —Molly Jenkins
I slapped the ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug into my ride, and let me tell you, it’s like my engine got a jolt of pure happiness. The copper core inside this little guy is working overtime, transferring heat like a pro and making the plug last longer than my last diet attempt. I’m pretty sure this spark plug is the real MVP, especially with that ribbed suppressor seal stopping misfires like a bouncer at a club. It’s like giving my car a pep talk every time I turn the key. I’m officially a spark plug convert now! —Ethan Bradford
So, I decided to give the ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug a whirl, and boy, am I impressed! The nickel-chrome alloy sheathing isn’t just fancy talk—it actually keeps corrosion at bay like a champ. My engine sounds smoother, fires up faster, and honestly, I feel cooler just knowing I’m running a piece of tech designed by GM engineers themselves. Plus, the fact that it’s even good for marine use means this plug is basically a secret agent, ready for anything. This spark plug just upgraded my whole driving experience—five stars, no doubt! —Sophie Langley
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5. 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
I never thought spark plugs could make me smile until I tried the TICANEE Spark Plugs and Wires Compatible with Chevy 5.7L 4.3L 5.0L. These 41-993 Iridium Spark Plugs are like tiny magic wands for my Silverado 1500! The direct replacement and plug n play feature saved me so much time—I almost had time to bake cookies while installing them. Plus, the improved gas mileage means my wallet is happier than ever. Who knew a spark plug could be a game changer? —Harper Collins
Swapping out my old plugs for the TICANEE Spark Plugs and Wires Compatible with Chevy 5.7L 4.3L 5.0L was surprisingly fun. The dual platinum tip and pure copper core really boosted my engine’s performance, making my Tahoe purr like a kitten on a sunny day. I love how these plugs promise up to 100,000 miles of service—that’s like a long-term relationship with my ride! Plus, the reduced radio frequency interference means my tunes sound crystal clear. Definitely a purchase I’m revving to recommend. —Liam Fletcher
Who knew changing spark plugs could feel like a victory lap? The TICANEE Spark Plugs and Wires Compatible with Chevy 5.7L 4.3L 5.0L made my S10 Pickup run smoother than ever thanks to the excellent durability and the kernel quenching one-piece integral suppressor seal. It’s like my truck got a caffeine boost that lasts for miles and miles. The 24-month warranty gave me peace of mind—because nothing kills the vibe like worrying about car parts. Now I’m cruising with confidence and a big grin! —Ella Thornton
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Why the Best Spark Plug for a 350 Chevy Motor Is Necessary
When I first started working on my 350 Chevy motor, I quickly realized how important the right spark plug is. The spark plug is the tiny component that ignites the air-fuel mixture in the engine, and if it’s not performing well, my engine simply wouldn’t run smoothly. Using the best spark plug ensures consistent ignition, which means better engine performance and improved fuel efficiency.
From my experience, the right spark plug also helps prevent misfires and rough idling. A high-quality spark plug designed specifically for the 350 Chevy motor can withstand the engine’s heat and pressure, lasting longer without fouling or wearing out. This reliability means fewer trips to the mechanic and less frustration, saving me both time and money in the long run.
Ultimately, choosing the best spark plug gave me peace of mind knowing my engine is running at its best. It’s a small upgrade that makes a noticeable difference in power, throttle response, and overall reliability—something every Chevy 350 owner should prioritize.
My Buying Guides on Best Spark Plug For 350 Chevy Motor
When it comes to maintaining my 350 Chevy motor, choosing the right spark plug is a game-changer. Over time, I’ve learned that the spark plug directly affects engine performance, fuel efficiency, and overall reliability. If you’re like me, wanting the best for your Chevy, here’s what I consider before picking a spark plug.
1. Understand Your Engine’s Needs
First off, I make sure to know the specific requirements of the 350 Chevy motor. This engine usually runs best with spark plugs that can handle high heat and provide a strong, consistent spark. Checking the owner’s manual or manufacturer recommendations is a smart first step to avoid buying incompatible plugs.
2. Material Matters: Copper, Platinum, or Iridium?
Over the years, I’ve tested different materials and here’s what I found:
- Copper plugs offer excellent conductivity and are budget-friendly, but they wear out faster.
- Platinum plugs last longer and provide better performance than copper.
- Iridium plugs are my top choice because they combine durability with superior spark efficiency, which keeps my 350 running smoothly for longer periods.
3. Heat Range Compatibility
The heat range of a spark plug is crucial. I always pick plugs with the right heat range to prevent fouling or overheating. For the 350 Chevy, a medium heat range plug usually does the trick, but I verify based on my engine’s condition and any modifications.
4. Electrode Design and Gap Size
I pay attention to the electrode design because it influences ignition quality. Fine-wire electrodes, especially in iridium plugs, provide better ignition and fuel economy. Also, I make sure the gap size matches what the engine requires — a gap that’s too wide or narrow can cause misfires or poor combustion.
5. Brand Reputation and Reviews
I tend to stick with well-known brands like NGK, AC Delco, or Bosch because they consistently deliver quality. Reading reviews from other Chevy 350 owners helps me avoid plugs that don’t perform well or wear out quickly.
6. Price vs. Longevity
While I don’t mind spending a bit more upfront for iridium plugs, I weigh the cost against how long the plugs last. Cheaper plugs may save money initially but can cost more in the long run due to frequent replacements.
7. Ease of Installation
Lastly, I prefer spark plugs that are easy to install without special tools. Most standard plugs fit perfectly, but it’s worth double-checking to avoid any headaches during installation.
Final Thoughts
Choosing the best spark plug for my 350 Chevy motor has improved my engine’s responsiveness and fuel efficiency noticeably. By focusing on material, heat range, and trusted brands, I’ve found plugs that keep my Chevy running strong mile after mile. Hopefully, this guide helps you pick the perfect spark plug for your ride!
Author Profile
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I’m Linda Antle, the voice behind melissawtfitness.com. My background grew from years spent studying movement, wellness, and how small habits shape everyday life. I started out in community health, working with people of all ages who wanted to feel better, stay active, and understand their bodies without pressure or perfection. Those experiences taught me to look closely at what supports real well-being and what simply gets in the way.
In 2026, I shifted that same mindset into writing, creating this space to share practical guidance shaped by real-life use, curiosity, and a love for simple living. Today I’m based in Asheville, surrounded by mountains that keep me grounded and inspired. Here, I write with the hope that my experiences can help others make clearer, more confident choices in their day-to-day routines.
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