Best Spark Plugs For KA24DE Reviewed (Top 5 for 2025)

I’ve spent countless hours wrenching on the legendary KA24DE engine, and if there’s one maintenance item that immediately improves performance and reliability, it’s ignition components. When I first bought my S14, the idle was rough, but simply swapping out old components brought the crisp response back. Finding the best spark plugs for ka24de doesn’t just mean chasing horsepower; it means ensuring reliable starts and smooth operation, whether you’re daily driving or hitting the track. This comprehensive guide covers the top ignition components—plugs and essential wires—to keep your Nissan running strong.

IMAGE	PRODUCT NAME	AMAZON LINK
	NGK 7090 BKR5EGP G-Power Spark Plug, Pack of 4	View on Amazon
	NGK NX 13 Spark Plug Wires Set Nissan S14 240SX…	View on Amazon
	VMS RACING 91-98 RED SPARK PLUG WIRES Set Compatible with…	View on Amazon
	NGK 3922 Pack of 4 Spark Plugs (BR6HS)	View on Amazon
	VMS RACING 93-01 RED Spark Plug Wires Set Compatible with…	View on Amazon

NGK 7090 BKR5EGP G-Power Spark Plug, Pack of 4

These G-Power platinum plugs are an excellent choice if you’re looking for a cost-effective yet reliable upgrade over standard copper. They feature a fine platinum alloy tip which drastically reduces tip erosion, maintaining a consistent spark over a longer period compared to traditional options. If you’re running a stock or mildly tuned KA24DE, these plugs offer improved cold starts and better fuel efficiency, making them one of the top contenders for the best spark plugs for ka24de daily drivers.

Key features that stand out:
– Fine Wire Platinum Tip: Ensures a focused, consistent spark.
– Improved Durability: Platinum resists wear better than copper.
– Copper Core: Efficiently dissipates heat to prevent overheating.

Pros:
– Exceptional value for a premium material plug.
– Provides reliable, consistent ignition performance.
– Longer lifespan than standard copper plugs.

Cons:
– Platinum isn’t quite as conductive as true copper or iridium.

Best for: Daily drivers and stock KA24DE engines prioritizing longevity and reliability.

Expert Opinion: The BKR5EGP is a workhorse plug. It’s a reliable, slightly cooler heat range (5) that handles stock compression and normal driving beautifully without requiring frequent changes.

NGK NX 13 Spark Plug Wires Set Nissan S14 240SX KA24DE 95 – 98

While we’re focused on spark plugs, the wires are equally crucial, especially for the SOHC and DOHC KA24DE engines that use them. This genuine NGK wire set is the gold standard for factory replacement and mild performance applications. They ensure maximum voltage transfer from the coil to the plug, minimizing resistance and preventing misfires, which is essential for maintaining smooth power delivery throughout the rev range of your 240SX.

Key features that stand out:
– Genuine NGK Parts: Guaranteed OEM quality fitment and performance.
– Variable Pitch Wire Winding: Suppresses RFI (Radio Frequency Interference) effectively.
– Direct Replacement: Ensures a hassle-free installation on the 95-98 S14 KA24DE.

Pros:
– Excellent fitment and factory reliability.
– Durable outer jacket protects against engine bay heat.
– Eliminates common misfire issues caused by old, cracked wires.

Cons:
– These are OEM replacements, not extreme high-performance wires.

Best for: KA24DE owners seeking guaranteed, reliable OEM-level ignition component restoration.

Expert Opinion: Never underestimate the importance of fresh wires. This NGK set is critical for maintaining the intended factory performance curve in your S14 and pairs perfectly with any high-quality NGK spark plug.

VMS RACING 91-98 RED SPARK PLUG WIRES Set Compatible with NISSAN 240SX KA24DE S13 S14 SOHC 1991-1998

If you’re upgrading your SOHC KA24DE ignition system and want superior performance and a visual flare, the VMS RACING 10.2mm wire set is a fantastic option. These high-performance wires feature a thick 10.2mm 100% silicone jacket for excellent heat protection, combined with a Kevlar inner core. This construction minimizes electrical resistance, ensuring the spark plug receives maximum voltage, resulting in a stronger, more consistent spark delivery, especially beneficial when paired with iridium or platinum plugs.

Key features that stand out:
– 10.2mm Spiral Core: Thickest silicone jacket for extreme heat resistance.
– Kevlar Inner Core: Provides incredible strength and low impedance conductivity.
– Aramid Stainless Steel Fiber Core: Ensures peak electrical conductivity and static-free operation.

Pros:
– Significantly reduces electrical resistance for peak performance.
– Extremely high resistance to heat and oil breakdown.
– Bold red color adds an aggressive performance look.

Cons:
– The thick 10.2mm diameter can make routing slightly snug in tight engine bays.

Best for: SOHC KA24DE owners looking for a high-performance upgrade with superior insulation and conductivity.

Expert Opinion: The massive 10.2mm insulation on these VMS Racing wires provides superb protection, making them ideal for spirited driving or light track use where engine bay temperatures spike frequently. They are noticeably robust.

NGK 3922 Pack of 4 Spark Plugs (BR6HS)

The NGK 3922 BR6HS plugs are standard copper core plugs known for their exceptional thermal conductivity and reliability. While the BKR series is typically recommended for modern KA24DE applications, the BR6HS serves as a reliable option often specified for older or specific modified versions requiring a slightly different reach or heat range. As a genuine NGK part, you are guaranteed consistency and reliable performance, which is vital for preventing misfires.

Key features that stand out:
– Genuine OEM NGK: Assures manufacturing quality and reliability.
– Copper Core: Highly efficient heat transfer and excellent conductivity.
– Standard Design: Tried and tested design for predictable performance.

Pros:
– Extremely cost-effective replacement option.
– Excellent conductivity thanks to the copper core.
– Easy to find and widely compatible with various engines requiring this spec.

Cons:
– Copper plugs require more frequent replacement than platinum or iridium options.

Best for: Budget-conscious owners or specialized KA applications that require this specific heat range and tip design.

Expert Opinion: Copper is the most conductive material, making it ideal for high-output setups, but you must factor in the shorter service life. For a stock KA, the long-life platinum plugs (like the 7090) might be more practical, but for a dedicated tune, this copper option delivers results.

VMS RACING 93-01 RED Spark Plug Wires Set Compatible with Nissan Altima 2.4L KA24DE DOHC Engines 1993-2001

This VMS Racing wire set is specifically engineered for the DOHC KA24DE found in the Nissan Altima (and the DOHC 240SX variant, though fitment should be confirmed). Like its SOHC counterpart, these wires boast a 10.2mm silicone jacket and a Kevlar core, offering maximum spark delivery and superior heat protection. Crucially, this set includes the fifth coil wire, making it a complete replacement package for the specific DOHC ignition system setup, ensuring optimal performance for the best spark plugs for ka24de in DOHC models.

Key features that stand out:
– Includes 5th Coil Wire: Complete set for the DOHC KA24DE system configuration.
– 10.2mm 100% Silicone: Exceptional resistance to high temperatures and contaminants.
– Low Impedance Core: Maximizes voltage transfer to the plugs.

Pros:
– Full, comprehensive replacement set for DOHC KA24DE.
– Provides high-performance conductivity and durability.
– Stops energy leakage common with aging, cracked factory wires.

Cons:
– Primarily designed for Altima fitment, so confirm length for 240SX DOHC models.

Best for: DOHC KA24DE owners needing a durable, high-performance wire replacement, especially where the ignition coil is located externally.

Expert Opinion: If you have the DOHC version, securing a set that includes the often-overlooked coil wire (as this VMS set does) is essential for a complete and reliable ignition overhaul. The heavy-duty jacket ensures they last significantly longer than cheap substitutes.

Practical Comparison Insights: Plugs vs. Wires

When evaluating the best spark plugs for ka24de, it’s vital to understand the materials used and the necessity of complementary components.

Material Differences: The NGK 7090 utilizes platinum, providing an excellent balance of longevity and consistent spark quality, making it ideal for extended service intervals. Conversely, the NGK 3922 is copper, which has the highest conductivity but requires replacement more frequently, usually every 15,000 to 20,000 miles.

Performance vs. OEM: The NGK wire sets (NX 13) offer reliable, factory-spec performance and fitment. The VMS Racing wires, however, provide a measurable performance upgrade due to their thicker insulation (10.2mm) and low impedance core, which minimizes voltage drop under demanding conditions.

KA24DE Configuration Matters: If you own an early SOHC KA24DE, look closely at the VMS 91-98 set. If you have the later DOHC KA24DE, the VMS 93-01 set is required because it includes the necessary coil wire. Always ensure your spark plugs and wires are rated for the same heat and performance level to prevent misfires.

Final Verdict: Choosing Your KA24DE Ignition Components

Determining the absolute best spark plugs for ka24de comes down to your priorities: reliability, longevity, or peak performance.

For the Best Overall Reliability and Longevity: We strongly recommend the NGK 7090 BKR5EGP G-Power Spark Plugs. They offer significant durability over standard plugs without a massive price hike. Pair these with the NGK NX 13 Wire Set for proven OEM performance and fitment.

For Modified or Performance-Oriented KA24DEs: If you are running performance upgrades and demand maximum spark energy, combine a high-conductivity copper plug (like the NGK 3922) with a high-performance wire set like the VMS RACING 91-98 (SOHC) or 93-01 (DOHC) wires. This combination ensures the highest voltage transfer possible, though remember to check your copper plugs frequently.

Best Spark Plugs For KA24DE FAQ

What is the correct gap size for KA24DE spark plugs?

For a stock KA24DE engine, whether SOHC or DOHC, the recommended spark plug gap is typically 0.044 inches (1.1mm). If you are running forced induction (turbo or supercharger), you may need to reduce this gap slightly (e.g., down to 0.028–0.032 inches) to prevent spark blow-out under high boost. Always consult the specific plug manufacturer’s recommendation for modified setups.

Should I choose Iridium, Platinum, or Copper spark plugs for my KA24DE?

It depends on your use case. Copper offers the best conductivity for performance but has a very short life (ideal for frequent racers). Platinum (like the NGK G-Power) offers a great balance of performance and longevity, lasting 60,000+ miles. Iridium offers the longest life (up to 100,000 miles) and excellent performance, making it the preferred choice for those who want a premium, long-lasting plug in a reliable KA24DE.

What causes spark plug fouling in the KA24DE?

Fouling is often caused by incomplete combustion. In the KA24DE, this can be attributed to several factors, including: running too rich (too much fuel), excessive oil consumption due to worn piston rings or valve seals, or using a spark plug with an incorrect heat range. If your plugs are black and oily, investigate internal engine wear.

Does the heat range matter when selecting best spark plugs for ka24de?

Yes, the heat range is crucial. A “colder” plug dissipates heat faster and is used in high-performance or forced induction applications to prevent pre-ignition. A “hotter” plug retains heat and is better for stock or low-speed engines to burn off deposits. For a naturally aspirated KA24DE, a heat range 5 or 6 (like the BKR5EGP) is standard and safe.

How often should I replace my spark plug wires?

Even the best spark plug wires degrade over time due to high heat exposure. Standard OEM wires should be inspected and typically replaced every 60,000 to 80,000 miles. If you notice cracking, stiffness, or signs of burning, or if you experience random misfires, it’s time to swap them out for a fresh set like the NGK NX 13 or VMS Racing wires.

Can old spark plug wires cause misfires even if the spark plugs are new?

Absolutely. Old wires develop high internal resistance or cracks in the insulation, allowing voltage to leak out (arcing) before it reaches the spark plug terminal. This results in a weak spark or no spark at all, leading directly to a misfire. When replacing your best spark plugs for ka24de, replacing the wires is always recommended, especially if they are over five years old.