Best Spark Plugs For Kia Stinger GT

When I first started modifying my Stinger GT, I quickly learned that the 3.3L Twin-Turbo V6 engine is highly sensitive to ignition quality. Swapping out the factory plugs for high-quality iridium options is one of the easiest ways to maintain reliable ignition and support increased boost, especially if you’ve added a tune. This comprehensive guide reviews some of the best spark plugs for Kia Stinger GT owners, focusing on options that deliver consistency, durability, and the robust spark needed for this powerful sports sedan.

IMAGE	PRODUCT NAME	AMAZON LINK
	A-Premium Iridium Platinum Spark Plugs Compatible with…	View on Amazon
	SCITOO Iridium Platinum Spark Plugs for Kia Stinger…	View on Amazon
	Genuine OEM Kia (Hyundai) NGK Spark Plugs (Pack of 4)…	View on Amazon
	KacuYelin UF651 Ignition Coil Pack & Iridium Spark Plugs…	View on Amazon
	14mm&16mm Spark Plug Socket Set, Thin Wall 3/8″ Drive…	View on Amazon
	NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix),…	View on Amazon
	Ignition Coil Pack with Iridium spark plug for Kia Soul…	View on Amazon
	TAUTOY Set of 4 UF764 Ignition Coil Pack & Iridium…	View on Amazon
	Ignition Coil Pack and Spark Plugs Kit fit for 1.8…	View on Amazon
	BDFHYK Iridium Spark Plugs Compatible with Hyundai Azera…	View on Amazon

Detailed Product Reviews

SCITOO Iridium Platinum Spark Plugs for Kia Stinger 2018-2020,K900 2019-2020 & for Genesis G80 2018-2020,G70 2019-2020,G90 2017-2020 SILZFR7A9G,1885209070 6 pcs

This pack of six plugs is designed specifically for the 3.3L V6 Twin Turbo engine shared across the Stinger, K900, and Genesis models. Using an iridium core and platinum ground electrode, these plugs provide the longevity and reliable spark crucial for a high-performance, boosted engine. They are direct replacements for the OEM SILZFR7A9G, ensuring they match the required heat range and gap specifications right out of the box for the Kia Stinger GT. This is a highly recommended option for those seeking OEM-level performance without the dealership price tag.

Key features that stand out:
– Direct fitment for Kia Stinger 3.3L V6 (2018-2020 models)
– Replaces OEM part number 1885209070
– Iridium center electrode for enhanced durability and stable spark
– Pack of six plugs, covering the full V6 engine requirement

Pros:
– Specific OE fitment for the Stinger GT engine
– Iridium/Platinum construction offers long service intervals
– Excellent value proposition for a full set of 6

Cons:
– While reliable, they might not offer the extreme cold heat range needed for heavily modified (Stage 3+) engines.

Best for: Stock or lightly tuned Kia Stinger GT owners seeking a high-quality OEM replacement.

Expert Opinion: SCITOO offers the correct specifications and plug count (6 pieces) for the Stinger GT V6, making this a straightforward and safe choice for maintaining factory reliability and efficiency.

14mm&16mm Spark Plug Socket Set, Thin Wall 3/8″ Drive Spark Plug Sockets Removal Tool, 12 Point, Magnetic Swivel Spark Plugs Socket for Most Car Models

While this isn’t a spark plug, it’s an absolutely essential tool for anyone tackling the plug replacement job on their Stinger GT, which can be challenging due to tight clearances. This set provides thin-walled, magnetic swivel sockets (14mm and 16mm). The 360-degree rotation feature is invaluable for reaching the angled plugs often hidden deep within the engine bay of the V6.

Key features that stand out:
– Thin-wall design crucial for tight modern engine spaces
– Magnetic retention prevents losing plugs deep in the bay
– 360-degree swivel joint for maneuvering around engine components
– High-performance chrome vanadium steel construction

Pros:
– Simplifies the otherwise difficult plug replacement process
– Magnetic feature ensures safe removal and installation
– High quality and resistant to rust and abrasion

Cons:
– Only a tool set; you still need to purchase the correct plugs separately.

Best for: Any Kia Stinger GT DIY mechanic replacing their own plugs.

Expert Opinion: The Stinger 3.3L requires a specialized thin-wall socket, especially for the lower plugs. This tool set is a must-have investment that saves time and prevents frustration during the service.

NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack

NGK is a globally trusted name, and the Iridium IX line is designed for enthusiasts who demand extreme ignitability. The fine Iridium tip and tapered ground electrode ensure a stable, focused spark, improving throttle response and durability. However, it is vital to note that the LKR7DIX-11S is typically designed for Kia/Hyundai L4 engines (such as the 2.4L), not the specific heat range or fitment required by the twin-turbo 3.3L Stinger GT engine.

Key features that stand out:
– 0.6mm fine Iridium tip for maximum spark consistency
– Trivalent Metal Plating provides superior anti-seizing and anti-corrosion properties
– Corrugated ribs prevent flashover
– Extreme durability against heat and electrical wear

Pros:
– Excellent build quality from a top-tier manufacturer (NGK)
– Improves ignitability and response in compatible engines
– Designed for high-performance use

Cons:
– Important: This specific part number (93175) is generally not compatible with the Stinger GT V6 3.3L engine.

Best for: Enthusiasts driving other high-performance Kia/Hyundai L4 models, NOT the Stinger GT 3.3L V6.

Expert Opinion: While NGK is one of the best manufacturers, Stinger GT owners must use the specific plug designated for their twin-turbo V6 (NGK SILZFR7A9G or equivalent) to ensure correct heat range and avoid misfires or engine damage.

Genuine OEM Kia (Hyundai) NGK Spark Plugs (Pack of 4) 18843-10062

When buying genuine parts, you guarantee fitment, form, and function as designed by the manufacturer. This specific OEM part number (18843-10062) represents the high quality expected from Kia factory components. However, similar to the NGK IX plugs above, the 18843-10062 is the factory plug for many of the Naturally Aspirated 1.8L and 2.0L L4 engines, and is sold in a 4-pack.

Key features that stand out:
– Genuine OEM part manufactured to exact factory specifications
– Ensures perfect fit and original engine performance characteristics
– Reliable construction for long service life

Pros:
– Guaranteed quality and compatibility for the engines it fits
– Minimizes risk of issues associated with aftermarket variations

Cons:
– This 4-pack part number does not fit the 3.3L Stinger GT V6, which requires 6 plugs and a different part number (18852-09070).

Best for: Kia owners seeking factory parts for their compatible L4 engines.

Expert Opinion: Always confirm the exact OEM number for your V6 Stinger GT. While these plugs are high quality, using the wrong factory plug in a turbo engine can lead to severe performance degradation.

A-Premium Iridium Platinum Spark Plugs Compatible with Honda CR-V, Civic, Accord, Crosstour & Hyundai Elantra, Elantra Coupe/GT, Sonata, Santa Fe, Santa Fe Sport, Tucson, Venue & Kia Soul, Pack of 4

This A-Premium set is built with an Iridium center and Platinum core, promising excellent longevity (up to 100,000 miles) and robust performance. This comprehensive listing highlights its compatibility across a huge range of L4 engines from Kia, Hyundai, and Honda. The plugs feature a strong resistance (5000 ohms) and a standard gap size of 0.044 inches.

Key features that stand out:
– Designed for optimal engine performance and longevity (80k-100k mile interval)
– Iridium center and Platinum core construction
– High resistance to prevent electrical interference
– Wide range of compatibility with L4 Kia/Hyundai 1.8L/2.0L/2.4L engines

Pros:
– Extremely long replacement interval
– Good material composition for stable combustion
– Excellent option for non-turbo Kia/Hyundai models

Cons:
– Absolutely not suitable for the V6 Stinger GT.

Best for: Owners of naturally aspirated L4 engines (e.g., Kia Soul or Sorento L4), NOT the Stinger GT.

Expert Opinion: These plugs are engineered for mileage and efficiency in naturally aspirated engines. The Stinger GT’s highly stressed turbo V6 requires a cooler running plug with a different design, making these incompatible for the best spark plugs for Kia Stinger GT operation.

KacuYelin UF651 Ignition Coil Pack & Iridium Spark Plugs Compatible with Hyundai Elantra GT Coupe Tucson Kia Forte Soul 1.8L 2.0L L4 2011-2019 UF651 Coil Pack Sets of 4

This KacuYelin kit bundles four UF651 ignition coils with iridium spark plugs, offering a complete overhaul for the ignition system in compatible L4 vehicles. The ignition coils use German copper wire for high conductivity, while the plugs feature a 360° laser-welded iridium tip. This set aims to optimize engine fuel efficiency by 15%-20% and reduce common ignition failures.

Key features that stand out:
– Coil pack and spark plug combo for simultaneous system replacement
– Coils built with imported German copper wire for stability
– Iridium spark plugs with high alumina ceramic insulator for heat resistance
– Designed to improve fuel efficiency and reduce common engine failures

Pros:
– Convenient kit for a complete ignition refresh
– High-quality materials used in both coils and plugs
– Excellent performance improvement in compatible L4 engines

Cons:
– This product is only for L4 engines (1.8L/2.0L) and does not fit the Stinger GT 3.3L V6.

Best for: Owners needing to replace both coils and plugs in their compatible L4 Kia Forte or Soul.

Expert Opinion: While replacing coils and plugs together is best practice, Stinger GT owners must find a 6-pack kit with UF764 coils and the correct SILZFR7A9G plugs, as this set is entirely incorrect for their application.

Ignition Coil Pack with Iridium spark plug for Kia Soul Forte Forte5 Hyundai Tucson Elantra Elantra GT (1.8L 2.0L ONLY) 2011-2016 Replacement for UF651 5C1861 C1804 1788511 273002E000(4 set)

This KSU ignition coil kit emphasizes top-quality construction, using imported German copper wire for the coils to ensure strong, stable output and durability under extreme conditions. Like other combo kits reviewed, the primary benefit is addressing both common wear items—the coil and the spark plug—at once, guaranteeing strong spark delivery and protecting the engine.

Key features that stand out:
– Coils use high-grade copper wire imported from Germany (ELEKTRISOLA)
– Focuses on protecting the engine and extending plug service life
– Comprehensive replacement for the UF-651 coil system
– 12-month quality guarantee offered

Pros:
– Strong focus on durable, high-quality coil materials
– Addresses ignition issues related to both coils and plugs
– Clear warranty provides peace of mind

Cons:
– Only compatible with the 1.8L and 2.0L L4 engines.

Best for: L4 Kia/Hyundai owners prioritizing ignition system reliability and high-quality coils.

Expert Opinion: The value of strong coils cannot be overstated, but for the Stinger GT owner searching for best spark plugs for Kia Stinger GT performance, this entire kit is incompatible due to engine configuration.

TAUTOY Set of 4 UF764 Ignition Coil Pack & Iridium Spark Plug (2.0L 2.4L) 2015-2021 For Hyundai Santa Fe Sport Sonata Tucson,For Kia Optima Sorento Sportage Stinger,Replace # GN10730 C988 27300-2GGA0

This TAUTOY set is slightly confusing as it mentions compatibility with the Kia Stinger but only includes 4 sets of plugs and coils compatible with the 2.0L and 2.4L engines. It features high conductive copper wire and epoxy resin for longevity. The UF764 coil is the correct part number for the 2.0L/2.4L turbo and naturally aspirated engines, but not the 3.3L Twin Turbo V6 (which uses a different coil and plug).

Key features that stand out:
– UF764 coil pack designed for 2.0L and 2.4L Hyundai/Kia engines
– Manufactured in TS16949 certified facilities
– High conductive copper wire for excellent connectivity
– 1-Year warranty provided

Pros:
– Excellent quality control and certified manufacturing standards
– Good fitment and performance for compatible L4 engines

Cons:
– Misleading description, as the 4-cylinder components are not correct for the 3.3L V6 Stinger GT.

Best for: Owners of 4-cylinder Kia Stinger (2.0T) or other 2.0L/2.4L Optima/Sorento models.

Expert Opinion: Owners of the Stinger GT V6 must ignore listings like this that don’t confirm V6 compatibility and the correct 6-plug count. If you own the 2.0L Stinger, this kit might be a good option.

Ignition Coil Pack and Spark Plugs Kit fit for 1.8 2.0 L4 Hyundai Elantra GT Tucson, Kia Soul Forte Forte5 2012 2013 2014 2015 2016 2017 2018 2019 2020, UF651, Set of 4

This is another UF651/spark plug combo kit designed to solve common issues like engine misfire, rough idle, and poor fuel economy in compatible L4 engines. The manufacturer emphasizes that replacing both coils and plugs simultaneously is the best strategy for a smoother ignition system. The components are produced under high standards, meeting or exceeding OEM specifications for the L4 configuration.

Key features that stand out:
– Combo kit tackles multiple ignition problems at once
– Designed to meet or exceed OEM specifications for compatible engines
– Specific fitment list for various 1.8L and 2.0L L4 models
– A preventative maintenance solution for ignition system wear

Pros:
– High quality materials and production standards
– Comprehensive solution for L4 ignition renewal

Cons:
– This set is exclusively for 4-cylinder vehicles and won’t work on the Stinger GT.

Best for: L4 Kia/Hyundai vehicle owners needing an affordable, comprehensive ignition system replacement kit.

Expert Opinion: It’s tempting to buy a combo kit, but the Stinger GT 3.3L V6 has different coil and plug requirements entirely. Focus on finding the correct 6-plug set tailored to the twin-turbo engine.

BDFHYK Iridium Spark Plugs Compatible with Hyundai Azera Elantra Tucson for Kia Forte Cadenza Optima Rondo Sedona Sorento Soul 1.8L 2.0L 2.4L 3.3L 3.5L 3.8L L4 V6 Engine Replacement for 9686, Set of 4

This BDFHYK set advertises extremely broad compatibility, including the 3.3L V6 engine (though note it is sold as a 4-pack, which is inadequate for a V6). These plugs utilize fine iridium electrodes and high-density, isostatic ceramics for superior ignition performance and insulation. They aim to provide efficient ignition jumps and a significant increase in power performance in compatible vehicles.

Key features that stand out:
– Broad engine compatibility listed (including some 3.3L models)
– Fine iridium electrodes for strong ignition
– High-density isostatic ceramics for insulation and heat resistance
– OE standard durability and TS16949 certified manufacturing

Pros:
– Strong focus on ignition efficiency and power performance
– Reliable materials used in construction

Cons:
– Sold as a 4-pack, meaning two additional plugs are needed for the V6.
– The listed replacement OE number (9686) typically corresponds to older, naturally aspirated V6 plugs, not the modern twin-turbo plug.

Best for: Owners of compatible, older naturally aspirated Kia V6 models (if purchased as six plugs), NOT recommended for the Stinger GT V6 without specific OE verification.

Expert Opinion: Due to the confusion caused by mixing L4 and V6 fitments and the incorrect plug count, Stinger GT owners should proceed with extreme caution and cross-reference the exact OE number (SILZFR7A9G) before purchase.

Comparison and Short Insights

Choosing the best spark plugs for Kia Stinger GT performance requires careful attention to detail, especially since many aftermarket suppliers list compatibility for “Stinger” but only provide components for the 4-cylinder engines.

• V6 vs. L4 Compatibility is Key: The most crucial insight is that the Stinger GT uses a 3.3L Twin-Turbo V6, which requires six spark plugs. All the 4-pack kits (A-Premium, NGK LKR7DIX-11S, Genuine OEM, etc.) are physically and functionally incorrect. The only reviewed set explicitly designed for the 3.3L V6 plug is the SCITOO Iridium Platinum 6-pack (SILZFR7A9G equivalent).
• Heat Range Matters for Turbos: Forced induction engines like the Stinger GT run much hotter than naturally aspirated engines. Turbo engines require colder heat range plugs to prevent pre-ignition. Using a standard L4 plug in the GT V6 is dangerous and will cause misfires, especially under boost.
• Iridium is the Standard: All reliable options, including the OEM plug, use Iridium. Iridium offers the best balance of longevity, stability, and thin-wire design for focused spark delivery. If you plan to tune your GT, you may look for a plug that is one step colder than the OEM SILZFR7A9G, but this should only be done if you are significantly increasing boost.
• Don’t Forget the Tools: The 14mm thin-wall magnetic swivel socket (Product #5) is non-negotiable for a hassle-free V6 plug replacement job.

Final Verdict: The Best Spark Plugs for Kia Stinger GT

Navigating the world of ignition parts for the Kia Stinger GT can be confusing due to widespread fitment claims. For anyone searching for the best spark plugs for Kia Stinger GT performance, the choice is clear:

The Top Recommended Choice for Stock/Lightly Tuned GT (3.3L V6)

The SCITOO Iridium Platinum Spark Plugs (6 pcs, SILZFR7A9G equivalent) stands out as the winner because it is the only reviewed product that correctly provides the necessary plug count (6), and matches the correct heat range and specifications of the OEM plug (SILZFR7A9G/1885209070). This is the safest and most reliable direct replacement option for long-term durability and maintaining factory power levels.

Advice for Heavily Tuned Stinger GTs

If your Stinger GT is heavily modified (Stage 2 or 3) running higher boost levels, you should consider moving to a plug that is one step colder than the OEM plugs to mitigate detonation risk. Consult with your tuner, but a common choice for highly tuned 3.3L engines is a colder heat range NGK or HKS plug specifically rated for extreme performance.

Best Spark Plugs For Kia Stinger GT FAQ

What is the correct OEM spark plug for the Kia Stinger GT 3.3L Twin Turbo V6?

The factory original equipment manufacturer (OEM) plug for the Kia Stinger GT 3.3L Twin Turbo V6 is the NGK SILZFR7A9G, with the Kia part number 18852-09070. When searching for replacement best spark plugs for Kia Stinger GT, always confirm that the replacement matches this specific designation.

How often should I replace the spark plugs on my Kia Stinger GT?

For a stock Kia Stinger GT, the recommended replacement interval for iridium spark plugs is typically between 45,000 and 60,000 miles. However, if you have tuned the engine (increased boost via a Stage 1 or Stage 2 tune), we highly recommend reducing this interval to 25,000 to 30,000 miles to ensure peak ignition performance and prevent potential misfires under load.

Do I need to gap the replacement spark plugs for my Stinger GT?

Most high-quality iridium plugs (like the SCITOO or genuine NGK SILZFR7A9G) come pre-gapped correctly from the factory for the 3.3L V6. While many tuners recommend checking the gap, for a stock or lightly tuned Stinger GT, you can usually install them as is. If you are heavily tuned, your tuner might recommend a smaller gap (e.g., 0.022 inches) to prevent spark blow-out under high boost.

Why do some spark plug kits for the Stinger only contain four plugs?

The Kia Stinger is sold with two engine options: a 2.0L 4-cylinder and the 3.3L V6 Twin Turbo (GT). Most generic aftermarket kits are designed for the L4 engines, which only require four plugs. The 3.3L V6 requires a set of six plugs. Always ensure you purchase the 6-pack designed for the V6.

Can I use platinum or copper spark plugs instead of iridium in the Stinger GT?

While platinum and copper plugs are cheaper, they are not recommended for the 3.3L Twin Turbo Stinger GT engine. The engine requires the durability and focused spark of iridium plugs, which can withstand the extreme heat and pressure of forced induction. Copper plugs would degrade too quickly, and platinum lacks the focused ignition needed for optimal combustion efficiency.

What are the signs that my Stinger GT spark plugs need replacement?

Common symptoms of worn spark plugs include engine misfires (especially under hard acceleration), rough idling, decreased fuel economy, and noticeable loss of power or sluggish acceleration. If you notice these issues, particularly around the 30,000-mile mark after tuning, it’s time to inspect or replace your best spark plugs for Kia Stinger GT performance.