Last Update: September 14, 2021 | post By Patrick Jordan, ASE Certified understand Technician. Chef Mechanic and Technical Writer in ~

Maybe a spark plug is small, however its duty is not so small. Through firing up the air-fuel mixture, a spark plug helps the engine to produce power to begin the automobile or accelerate it. So, having a high quality spark plug is important if you desire a smooth increasing performance from her vehicle.

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Maybe you must replace the spark plug mounted in your ignition system and you need help for that. That’s why I’m below in prior of you, through reviews of few of the best spark plugs for 350 Chevy engine the I’ve gone through. The list contains spark plugs with different purposes. Stick to me and also I’ll present you some awesome performers that can catch your eyes.

If you desire to acquire the many out that a spark plug on which you’re going come invest, choose up one from right here won’t make you remorse later. I recognize you’re interested to see some of the bests for her purpose. So, without more ado, let’s run to the reviews.

Check ours Editor’s selection
Bosch Automotive 9655 dual Iridium Spark Plug


7 year power satisfaction guarantee0.6mm fine wire firing pin provides superior ignitability94-96 Buick advertisement Chassis95-01 Pontiac cool Am, 95-02 Pontiac SunfireThe firing pin doesn’t need large voltage

Table the Contents

Top 5 finest Spark Plugs because that 350 Chevy Engine evaluate 2021

1. ACDelco R44LTS6 skilled Conventional Spark Plug

If friend are trying to find an aftermarket spark plug that boosts the power of her vehicle, this one indigenous ACDelco is something the you have the right to depend on. These are manufactured to administer value and ensure performance. A many ACDelco plugs are offered as OE of different vehicles. So, depending upon it is no a bad selection at all.

The main point of this spark plug is do of quality copper. This guarantees an reliable heat transfer and also thus the plug durability is likewise ensured. That comes through a ribbed suppressor seal that maximizes the resistance. As a result, misfires and flashovers are lessened to a great extent.

There is nickel-chrome alloy sheathing within which doesn’t permit corrosion ~ above the central electrode. Corrosion is likewise prevented indigenous the outside by a black color onyx coating external side of the plug. As a result, this spark plug support you because that a lengthy time without any type of performance drop.

ACDelco is a choice of most professionals. So, if you are trying to find maximum worth from a spark plug, I’ll imply you to going for this one.

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2. Bosch9655Double Iridium OE instead of Spark Plug

When girlfriend are searching for a spark plug that’ll certain maximum durability without performance drop, you can not simply disregard this one native Bosch. For an ext than 100 years, Bosch is providing quality spark plugs in the market for different varieties of vehicles. So, you have the right to depend top top the spark plug which is noted by one of the most experienced manufacturers.

Bosch has actually ensured a longer life the this spark plug with some technological changes. The fine cable Iridium firing pen doesn’t need a huge voltage to work. Also, the center electrode has copper main point that ensures far better heat transfer. Therefore it eliminates fouling and pre-ignition. The ground electrode inside the spark plug is laser welded to ensure best performance.

The nickel-plated shell offers built-in corrosion protection and also complete anti-seize. As a result, the spark plug doesn’t require an extra anti-seize. The firing pen is make to resist corrosion to make certain that that works properly without any type of problem.

This one is a true show if girlfriend think about durability and efficiency. Being offered as OE spark plugs in numerous vehicles, this one can satisfy you v its unmatched performance.

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3. DENSO #4511 PLATINUM T T Spark Plugs — PT16TT

If friend are looking for a spark plug i beg your pardon is reliable and also durable for her Chevy, you will do it surely discover this Denso Platinum Twin guideline spark plug. Coming because that Denso, this spark plug is a premium-made one that deserve to be a perfect instead of for her OE spark plug.

The Twin-Tip modern technology was simply for part premium automobiles before. Yet Denso has carried it for continuous vehicles so the you get the maximum native a spark plug within her budget. The Twin tip design enables this spark plug to protect against misfires by ensuring much less obstruction when the void is quiet the same.

This spark plug comes through a Platinum-Titanium design where the centre electrode includes platinum and also the soil electrode has titanium. These steels reduce erosion and corrosion to supply superior spark performance. Also, this ensures prolonged life bicycle of approximately 60,000 miles. This means, exceptional performance because that a lengthy time in ~ a budget. Do you require more?

So, if girlfriend think you must experience a better acceleration with efficient fuel economy and less misfire, I’ll imply you to shot this. My experience with this was awesome. Ns hope yours will certainly be great too.

4. ACCEL 0576S-4 Shorty Copper core Spark Plug

If girlfriend are looking for a spark plug that have the right to make that room in ~ a short an are and still works as good as her OE one, also sometimes better, check this shorty from ACCEL. As well as ensuring preferably performance, this spark plug indigenous ACCEL is awesomely durable and also efficient in what it does.

As the fits in a short space, the protects the spark plug boots from gift burnt and also saves the headers from gift dented. In spite of being a ‘shorty’, it provides a boost in the performance and power at high RPM. Together a result, you will do it be satisfied in ~ what that does for you.

The main point of this plug is made of copper to ensure maximum thermal conductivity. There is a 14 mm machine-rolled thread the protects the top from the dent. Hence it ensures durability. Overall, this ‘shorty’ ensures much less misfire, flame dissipation and fouling. Hence it provides rapid throttle solution and performance in the consumption of fuel.

So, if you need something to fit in a short place and still carry out efficient power for a lengthy time, to buy this. Friend won’t regret for the decision, ns sure.

5. ACDelco yellow 14 RAPIDFIRE Spark Plug

In the list, this is another one native ACDelco which deserve to be a good pick for her 350 Chevy. The RapidFirefrom ACDelco is because that you if you are looking for a spark plug that’ll it is in a instead of for her old OE spark plug to deliver the exact enhance performance. If you space interested, let’s take a look end it.

The main point of the spark plug is do of pure copper which ensures far better heat transfer and durability. The centre electrode has platinum in that to provide quality and far better sparks. Together a result, low voltage sparks likewise work correctly without any misfire. Thus, your ignition mechanism requires less voltage 보다 usual.

It comes through two-piece brass and also glass seals which effectively reduce the interference and also ensure far better spark quality. Hence the plug ensures longer electrode life. Also, that shields the device from high combustion pressure.

The yellow labelled spark plugs indigenous ACDelco space designed to satisfy the OE expectations of those specialty vehicles which require high performance from it, because that example- police vehicles. Together a result, you have the right to expect her Chevy will perform an excellent after installation this. Friend can shot it.

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Best Spark Plug because that 350 Chevy Engine to buy Guide

You’ll uncover a most spark plugs there in the market however you can’t just buy and install one. You need to carefully inspect a couple of things and find the end which one is the finest according to her expectations. It is why I’ve ready a buying guide which can help you to find out the best chevy 350 spark plugs.


This is the most necessary thing due to the fact that you can’t gain satisfactory performance from an incompatible spark plug. While choosing the spark plugs come consider, make certain that you’re choose up i m sorry is compatible v your car model. Most websites come v a compatibility checking alternative where you have the right to put your vehicle model, make and also other details to inspect if that is compatible or not. Checking this is a must.


The material of spark plug describes the product of centre electrode. There are largely three types of materials used to do the center electrode that spark plugs.

Copper- Copper spark plugs are largely used to deliver OE performance. These space cooler to compare to other two types. In power driving situations, these are perfect.

Platinum-Platinum spark plugs operation a little bit hotter than copper ones. It runs longer because erosion is slow-moving in situation of platinum. For better performance, part spark plugs come with dual platinum design where the centre and also ground both electrodes room made of platinum.

Iridium-Iridium spark plugs are an ext durable comparing to the various other two. The reason is Iridium is much more efficient 보다 copper and platinum. Also, it wears lot slower. However these plugs will expense you more.


Picking increase the perfect spark plug depends on your choice too. There are some plugs which are made to supply the OE performance. On the various other hand, some space made come ensure much better performance than OE plugs. So, while gaining one, make sure that it supports your preference of performance.


Size refers to the size of the object or nut. There are different sizes available. All you must do is picking one that comes with the size of your OE spark plug. This matters because this help you to download the spark plug properly.

Also, check the price and user evaluate while selecting a spark plug for her vehicle.

Frequently asked Questions about Spark Plug

What will be better- Cold spark plug or hot one?

The answer to your inquiry depends ~ above a few factors. If your engine comes through a rich air-fuel ratio or if you mainly drive on short speed, warm plugs space a great pick for you. On the various other hand, if your vehicle has a short air-fuel ratio or friend are into high-speed driving, picking up a cool plug will certainly be great for you.

When must I adjust my spark plugs?

Typically Copper plugs deserve to support you for 30,000 miles and Iridium plugs can support for 50,000 miles. Platinum plugs will assistance you in between this range. Yet this is not constantly accurate. Depending upon the problem of your engine, it might be shorter. Because that that, there space a couple of symptoms i m sorry can aid you to know that your plugs may need a checking. The symptoms are-

Backfiring when acceleratingReduced acceleration performanceLonger time to start the engine

If you confront these conditions, your spark plugs may need to it is in changed.

Is cleaning a spark plug a an excellent idea?

You have the right to clean her spark plug. But cleaning it through a brush or knife is not a an excellent idea since when you perform it to eliminate the deposits, it might reduce the efficiency of the spark plug. You may use spray-on plug cleaner for this purpose, however that might not successfully clean your spark plugs.

How to replace Chevy Spark Plugs and Ignition Coil

Final Verdict

The spark plugs discussed above are several of the ideal spark plugs for 350 Chevy engine the can aid you to improve the acceleration performance of her engine. In the list, there space all species of spark plugs- copper, platinum and iridium. So, no matter which type you’re feather for, you’ll have actually the choice to pick.

If girlfriend ask me to pick one, ns can’t since each has its very own speciality. But still if I need to pick, I’ll choose the Bosch one because I love the durability. The platinum Twin pointer from Denso is my 2nd pick for sure.

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However, in the end, the choice is constantly yours. So, examine each and also find one that fits perfectly to her need.

Filed Under: Auto Accessories

About Patrick Jordan

Patrick Jordan is an SAE Certified experienced auto mechanic and car enthusiast through 10 year of useful experience. That has functioned in some reputed garage in the USA That has actually helped him to gather an ext practical knowledge. Right now working at a significant automotive startup company. Competent in engine repair, vehicle upgrade, automobile interior, and exterior style management, off-road car maintenance, etc. From evaluate to expert solutions, you’ll find practically everything about automotive from him on