A-Premium Iridium Platinum Spark Plugs Pack of 6 for V6 Engines — Fine-Wire, Long-Life (14mm x 19mm, 0.044" Gap)

A-Premium Iridium Platinum spark plugs (pack of 6) are fine-wire, iridium-tipped, platinum-core plugs engineered for reliable ignition and extended service life in compatible V6 engines.

These spark plugs combine an iridium center tip with a platinum core and a fine-wire design to deliver consistent firing, improved throttle response, and long replacement intervals. Designed as direct-fit replacements for many Toyota, Lexus, Mercedes-Benz, Suzuki, Chrysler and other models listed in the vehicle fitment, this six-pack includes components sized for common V6 and select inline-six engines where a 14.00 mm thread, 19 mm reach and 0.044-inch gap are specified. The plugs are optimized for modern combustion chambers and conventional ignition systems that benefit from a high-melt-point electrode paired with a durable core.

Which vehicles and engines will these A-Premium plugs fit?

These spark plugs are made to match factory dimensions and part references for a range of V6 and some inline-six applications. Check the reference numbers and thread/reach specs against your owner's manual or existing plugs to confirm fitment before ordering.

• Compatible models include Toyota Camry, Avalon, Highlander, Sienna, Solara, Supra (select years and engines listed).
• Lexus fitments: ES300, ES330, RX300, RX330, RX400h, SC300 (specific years noted).
• Also listed for Chrysler Crossfire, Mercedes-Benz W203 C32 AMG and R170 SLK32 AMG, Suzuki Verona and other compatible applications.
• Reference numbers supported: 3297, SK20R11, AI3923, XP3923, 9091901210.

How do the iridium tip and platinum core help my engine?

Iridium and platinum are chosen for their high melting points and resistance to wear, which keeps the electrode geometry stable over many miles. That stability preserves an efficient spark, helping maintain ignition consistency, smoother idle and reliable start-up performance throughout the service life.

• Iridium center electrode tip for a focused, durable spark.
• Platinum core improves longevity by resisting electrode erosion.
• Fine-wire design reduces voltage demand while maintaining spark energy.
• Recommended replacement interval: 80,000–100,000 miles under normal conditions.

What are the physical specifications I need to know before buying?

Confirming a few key dimensions avoids misfit and potential engine damage. These plugs are manufactured with specific thread, hex, reach and gap dimensions that mirror many OE requirements for the listed vehicles.

• Thread diameter: 14.00 mm; reach: 19 mm — check your engine's required reach.
• Hex size: 16 mm for socket fit during installation.
• Gap: pre-set to 0.044 inches; Resistance: 5000 ohms.
• Center electrode: iridium tip; core material: platinum.

How should I install and maintain these spark plugs for best results?

Installation requires proper torque and a clean well to ensure sealing and performance. Use the correct socket, thread lubricant if recommended by your vehicle manufacturer, and verify the gap and torque to avoid cross-threading or misfires.

• Use a 16 mm spark plug socket and torque to the vehicle manufacturer’s specification.
• Verify 0.044-inch gap before installation if engine conditions demand adjustment.
• Replace all plugs at the same interval to preserve balanced ignition across cylinders.
• Inspect ignition coils and wires when replacing plugs to prevent future faults.

Who is this for: The A-Premium Iridium Platinum spark plugs in a pack of six are intended for owners and technicians maintaining compatible V6 and listed inline-six engines who want a long-life, direct-fit replacement that balances performance and longevity. They suit drivers who prefer extended service intervals, DIY installers with basic tools and professional mechanics looking for a reliable aftermarket option that mirrors OE dimensions and electrical characteristics.