Maybe a spark plug is small, but its responsibility is not so small. By firing up the air-fuel mixture, a spark plug helps the engine to produce power to start the vehicle or accelerate it. So, having a quality spark plug is necessary if you want a smooth accelerating performance from your vehicle.
Maybe you need to replace the spark plug installed in your ignition system and you need assistance for that. That’s why I’m here in front of you, with reviews of some of the best spark plugs for 350 Chevy engines that I’ve gone through. The list includes spark plugs with different purposes. Stick to me and I’ll show you some awesome performers that can catch your eye.
If you want to get the most out of a spark plug on which you’re going to invest, picking up one from here won’t make you regret later. I know you’re interested to see some of the bests for your purpose. So, without further ado, let’s jump to the reviews.
Check our Editor’s Choice
Bosch Automotive 9655 Double Iridium Spark Plug
- 7 year performance satisfaction guarantee
- 0.6mm fine wire firing pin provides superior ignitability
- 94-96 Buick Commercial Chassis
- 95-01 Pontiac Grand Am, 95-02 Pontiac Sunfire
- The firing pin doesn’t need huge voltage
Top 5 Best Spark Plugs for 350 Chevy Engine Reviews
1. ACDelco R44LTS6 Professional Conventional Spark Plug
If you are looking for an aftermarket spark plug that enhances the performance of your vehicle, this one from ACDelco is something that you can depend on. These are manufactured to provide value and ensure performance. A lot of ACDelco plugs are used as OE of different vehicles. So, depending on it is not a bad choice at all.
The core of this spark plug is made of quality copper. This guarantees an effective heat transfer and thus the plug durability is also ensured. It comes with a ribbed suppressor seal that maximizes the resistance. As a result, misfires and flashovers are reduced to a great extent.
There is nickel-chrome alloy sheathing inside which doesn’t allow corrosion on the central electrode. Corrosion is also prevented from the outside by a black onyx coating outer side of the plug. As a result, this spark plug supports you for a long time without any type of performance drop.
ACDelco is a choice of most professionals. So, if you are looking for maximum value from a spark plug, I’ll suggest you to going for this one.
2. Bosch9655Double Iridium OE Replacement Spark Plug
When you are looking for a spark plug that’ll ensure maximum durability without performance drop, you can’t simply ignore this one from Bosch. For more than 100 years, Bosch is providing quality spark plugs in the market for different types of vehicles. So, you can depend on the spark plug which is provided by one of the most experienced manufacturers.
Bosch has ensured a longer life of this spark plug through some technical changes. The fine wire Iridium firing pin doesn’t require a huge voltage to work. Also, the center electrode contains copper core that ensures better heat transfer. Thus it eliminates fouling and pre-ignition. The ground electrode inside the spark plug is laser welded to ensure maximum performance.
The nickel-plated shell offers built-in corrosion protection and complete anti-seize. As a result, the spark plug doesn’t need an extra anti-seize. The firing pin is made to resist corrosion to make sure that it works properly without any problem.
This one is a true performer if you think about durability and efficiency. Being used as OE spark plugs in many vehicles, this one can satisfy you with its unparalleled performance.
3. DENSO #4511 PLATINUM T T Spark Plugs — PT16TT
If you are looking for a spark plug which is reliable and durable for your Chevy, you’ll surely find this Denso Platinum Twin Tip spark plug. Coming for Denso, this spark plug is a premium-made one that can be a perfect replacement for your OE spark plug.
The Twin-Tip Technology was just for some premium automobiles before. But Denso has brought it for regular vehicles so that you get the maximum from a spark plug within your budget. The Twin Tip design enables this spark plug to avoid misfires by ensuring less obstruction when the gap is still the same.
This spark plug comes with a Platinum-Titanium design where the centre electrode contains platinum and the ground electrode contains titanium. These metals reduce erosion and corrosion to deliver superior spark performance. Also, this ensures an extended life cycle of up to 60,000 miles. This means, superior performance for a long time within a budget. Do you need more?
So, if you think you need to experience better acceleration with efficient fuel economy and less misfire, I’ll suggest you to try this. My experience with this was awesome. I hope yours will be awesome too.
4. ACCEL 0576S-4 Shorty Copper Core Spark Plug
If you are looking for a spark plug that can make its room within a short space and still works as great as your OE one, even sometimes better, check this shorty from ACCEL. Besides ensuring maximum performance, this spark plug from ACCEL is awesomely durable and efficient in what it does.
As it fits in a short space, it protects the spark plug boots from being burnt and saves the headers from being dented. In spite of being a ‘shorty’, it offers a boost in the performance and power at high RPM. As a result, you’ll be satisfied at what it does for you.
The core of this plug is made of copper to ensure maximum thermal conductivity. There is a 14 mm machine-rolled thread that protects the heads from the dent. Thus it ensures durability. Overall, this ‘shorty’ ensures less misfire, flame dissipation and fouling. Thus it provides quick throttle response and efficiency in the usage of fuel.
So, if you need something to fit in a short place and still provide efficient performance for a long time, buy this. You won’t regret for the decision, I’m sure.
5. ACDelco Gold 14 RAPIDFIRE Spark Plug
In the list, this is another one from ACDelco which can be a good pick for your 350 Chevy. The RapidFirefrom ACDelco is for you if you are looking for a spark plug that’ll be a replacement for your old OE spark plug to deliver the exact match performance. If you are interested, let’s take a look over it.
The core of the spark plug is made of pure copper which ensures better heat transfer and durability. The centre electrode contains platinum in it to deliver quality and better sparks. As a result, low voltage sparks also work properly without any misfire. Thus, your ignition system requires less voltage than usual.
It comes with two-piece brass and glass seals which effectively reduce the interference and ensure better spark quality. Thus the plug ensures longer electrode life. Also, it shields the system from high combustion pressure.
The gold labelled spark plugs from ACDelco are designed to meet the OE expectations of those specialty vehicles which require high performance from it, for example- police vehicles. As a result, you can expect your Chevy will perform great after installing this. You can try it.
Best Spark Plug for 350 Chevy Engine Buying Guide
You’ll find a lot of spark plugs there in the market but you can’t just buy and install one. You need to carefully check a few things and find out which one is the best according to your expectations. That’s why I’ve prepared a buying guide which can help you to find out the Best chevy 350 spark plugs.
- Compatibility
This is the most important thing because you can’t get satisfactory performance from an incompatible spark plug. While selecting the spark plugs to consider, make sure that you’re picking up which is compatible with your vehicle model. Most websites come with a compatibility checking option where you can put your vehicle model, make and other information to check if that is compatible or not. Checking this is a must.
- Material
The material of spark plug refers to the material of centre electrode. There are mainly three types of materials used to make the centre electrode of spark plugs.
Copper- Copper spark plugs are mostly used to deliver OE performance. These are cooler comparing to other two types. In performance driving situations, these are perfect.
Platinum-Platinum spark plugs run a bit hotter than copper ones. It runs longer because erosion is slow in case of platinum. For better performance, some spark plugs come with dual platinum design where the centre and ground both electrodes are made of platinum.
Iridium-Iridium spark plugs are more durable comparing to the other two. The reason is Iridium is more efficient than copper and platinum. Also, it wears much slower. But these plugs will cost you more.
- Preference
Picking up the perfect spark plug depends on your preference too. There are some plugs which are made to deliver the OE performance. On the other hand, some are made to ensure better performance than OE plugs. So, while getting one, make sure that it supports your preference of performance.
- Size
Size refers to the size of the thread or nut. There are different sizes available. All you need to do is selecting one that comes with the size of your OE spark plug. This matters because this helps you to install the spark plug properly.
Also, check the price and user reviews while selecting a spark plug for your vehicle.
Frequently Asked Questions About Spark Plug
What will be better- Cold spark plug or hot one?
The answer to your question depends on a few factors. If your engine comes with a rich air-fuel ratio or if you mostly drive on low speed, hot plugs are a good pick for you. On the other hand, if your vehicle has a low air-fuel ratio or you are into high-speed driving, picking up a cool plug will be good for you.
When should I change my spark plugs?
Typically Copper plugs can support you for 30,000 miles and Iridium plugs can support for 50,000 miles. Platinum plugs will support you in between this range. But this is not always accurate. Depending on the condition of your engine, it may be shorter. For that, there are a few symptoms which can help you to understand that your plugs may need a checking. The symptoms are-
- Backfiring while accelerating
- Reduced acceleration performance
- Noticeable change in fuel economy
- Longer time to start the engine
If you face these conditions, your spark plugs may need to be changed.
Is cleaning a spark plug a good idea?
You can clean your spark plug. But cleaning it with a brush or knife is not a good idea because when you do it to remove the deposits, it may reduce the efficiency of the spark plug. You may use spray-on plug cleaner for this purpose, but that may not efficiently clean your spark plugs.
How to Replace Chevy Spark Plugs and Ignition Coil
Final Verdict
The spark plugs discussed above are some of the best spark plugs for 350 Chevy engine that can help you to improve the acceleration performance of your engine. In the list, there are all types of spark plugs- copper, platinum and iridium. So, no matter which type you’re looking for, you’ll have the option to pick.
If you ask me to pick one, I can’t because each has its own speciality. But still if I have to pick, I’ll choose the Bosch one because I love the durability. The platinum Twin Tip from Denso is my second pick for sure.
However, in the end, the choice is always yours. So, check each and find one that fits perfectly to your need.
