5 Best Spark Plugs for LS1 Engines to Keep Them Running Well

The LS1 engine first appeared on the automobile market back in 1997 when it was originally created for the Chevy C5 Corvette. Since, the engine has made waves in the industry as being one of the best and most sought-after engines available.

What’s more, as technology has progressed through the years, adjustments and other editions have been created, most notably the Generation II and III models. These were designed to be smaller than the originals while being produced using iron and aluminum materials.

While these engines were physically smaller, they did pack more of a punch and provided the engine they’re installed into with a ton of power that was never before so accessible through an everyday car.

However, as a chain is only as strong as its weakest link, an engine is only as powerful as its parts will let it be. Today, we’re going to be focusing on the spark plugs of your LS1 engine, since it’s one of the most important and necessary parts.

Fail to install a decent spark plug, and your gas mileage, overall performance and power output and your overall fuel efficiency ratings will all suffer. So, to help you pick the right spark plugs for your LS1 engine, we’re here to help.

We’ve scoured the marketplace and tracked down a ton of LS1 spark plugs and then streamlined them down to just five of the best. If you’re looking for a powerful spark that gets the job done, you can bet your bottom dollar than any of the five below will perform above and beyond the call of duty.

NGK #3186 G-Power Platinum Spark Plugs TR5GP (6-Pack)

NGK #3186 G-Power Platinum Spark Plugs TR5GP (6-Pack)

Starting off our list, we’ve chosen the NGK spark plug, or more accurately, a pack of 6 spark plugs that give you more than enough to upgrade the current ones in your LS1 engine, and then keep some at the side for spares.

The NGK 6-pack set is really affordable, and we love how each spark plug is designed with affordability and performance in mind. These plugs are designed with a fine-point and a platinum-power performance rating, which makes them ideal for high-performance cars and engines, much like the LS1.

There’s really not too much to say about this spark plug. There are basically no negative points to it; each plug will work to the exact level you would expect and does nothing more, nothing less. There are no reports of dud plugs in circulation and the benefits to your engine are noticeable from the moment you install them!

Spark plugs don’t get much better than this!

  • Extremely high reliability rate
  • Made of platinum for best results and long lifespan
  • Obvious benefits to your engine
  • Easy to install and affordable
  • None!

ACDelco 41-962 Professional Platinum Spark Plug

ACDelco 41-962 Professional Platinum Spark Plug

Another leading and professional spark plug brand now as ACDelco is a popular choice when it comes to spark plugs, and this plug for your LS1 engine is no exception. While designed in one piece, this particular plug has been designed with three blended glass types.

This special design helps to eliminate the risk of radio frequencies and interference from your engine, helping the plug to perform to the best of its ability consistently. What’s more, this professional design helps to regulate your plug’s energy consumption and increases its overall lifespan.

Another fantastic feature you’re going to love is the double platinum point. This is an awesome touch since it offers incredible amount so of durability where the electrodes touch and helps to maintain the overall voltage flowing through it.

Again, there’s really nothing bad to say about these plugs, just that you need to remember to pick the right size. Get this right, and you can be sure that you can’t go wrong!

All in all, this is one spark plug that has raised the bar in terms of the features it offers and guarantees a long-life product that will not only continue to perform amazingly but also helps to save you money!

  • Double platinum point for the best type of connection
  • Self-manages voltage and energy consumption
  • Built to last (sometimes over 230,000 miles)
  • Designed to minimize the risk of external interference
  • None!

Denso 4511 Pt16TT Platinum TT Spark Plug

Denso 4511 PT16TT Platinum TT Spark Plug

If you’re looking for a super affordable spark plug that delivers outstanding results as well as coming with the guarantee to last for many years and miles to come, you might not need to look any further than the Denso Platinum TT spark plug.

This particular plug offers leading twin-tipped technology with an 11mm platinum electrode through the center. This is ideal for boosting your LS1 engine’s fuel efficiency, improving your acceleration and can even reduce your engine start times, more so than any other spark plug!

What you’ll really find interesting about this plug is the fact that it’s made with purified alumina powder insulator. This means the dielectric strength, and the thermal conductivity, of this plug, is outstanding and will continue to perform and remain stable, even when succumbing to extreme stress.

This, in all, creates a high-performance spark plug that’s built to last. Since this is another platinum build, it’s also proactively protected against things like rust, elemental erosion, and chemical erosion. Again, there’s nothing bad to say about these plugs, and you’re sure to love them!

  • Designed to improve fuel efficiency and start speeds
  • Twin-tipped for outstanding connectivity
  • Protected against rust and general wear and tear
  • Can withstand extreme engine stress and pressures
  • None!

Bosch 9602 Double Iridium Spark Plug

Bosch 9602 Double Iridium Spark Plug

Bosch is a household name when it comes to tools and technical equipment, and their spark plug release for the LS1 engine is no exception to the rule of great build quality and performance. Inside this plug, you’ll find a double iridium firing pin with a ground electrode inlay.

However, don’t let this jargon put you off. This basically refers to the design that means it will last up to four times longer than your standard copper spark plugs. This means you need to change your spark plugs less often, can enjoy all the added benefits, and save money in the long-term.

For example, this plug comes with a 0.6m fine wire firing pin. This helps to ignite your fuel in the most effective and efficient way, maximizing the performance of both the plug and your engine. This is again backed by a laser welded fuse that maximizes the durability of the pin.

There are a ton of extra features that Bosch have included in this pin. From insulated tips to prevent damage from misfiring to a nickel-plated shell that’s designed to protect the plug from erosion, spark plugs don’t get much better than this.

The only downside to these plugs is the price. They’re quite a bit more expensive than your typical spark plug, and the most expensive item on this list. Then again, if you’re looking for the highest quality plug that offers the most benefits, there’s no spark plug better than the Bosch 9602.

  • Continuous laser weld seals to maximize durability
  • Protected against damage through misfiring
  • Designed to maximize fuel efficiency, acceleration speeds, and costs
  • Comes with a 7-year guarantee
  • The premium price tag

ACDelco R44LTSM Professional Conventional Spark Plug

ACDelco R44LTSM Professional Conventional Spark Plug

To finish off this best-of spark plug list, we’ve gone full circle and come back around to ACDelco for another one of their spark plug masterpieces. This is another super-affordable plug that comes with an array of features you’ll be looking for.

For example, this plug is uniquely designed with a black onyx coating. This is used to help reduce the risk of corrosion over time, resulting in a product that has a long life. Inside, you’ll find a copper core which is used to transfer the heat the plug produces, again improving effectiveness.

While this plug may not be as effective as the platinum plugs, it still gets the job done, and for a good price per unit. In fact, most of the features related to this plug revolve around quality. There’s a ton of sealing features that stop dirt and grime infiltrating the plug, as well as ribbed suppressors that help to prevent the event of misfiring.

The only downside is that these plugs aren’t as good or as long-lasting as the other platinum varieties here, but you really do get good value for money. So, if you’re a budget-conscious buyer that wants to balance between affordability and performance, this could be the exact spark plug you’ve been looking for.

  • A cost-effective, affordable spark plug solution
  • Black onyx coating for extra protection
  • Designed to minimize the risk of misfiring
  • Designed to transfer heat better than other conventional plugs
  • Not as effective as other spark plugs on this list


While many drivers may overlook the importance of spark plugins, this can be a costly mistake, especially in the long-term when you’re trying to save money, maximize the performance of your vehicle, and get the most out of your LS1 engine.

No matter which one you choose, any of the five plugs we’ve listed above will make ideal choices for your car, so what are you waiting for; take your car to the next level today!