IFATRUNK Iridium Spark Plugs 6 Pack — 3.1L–4.3L V6 Replacement Plugs, Laser-Welded Iridium Tips

IFATRUNK Iridium Spark Plugs 6 Pack: high-strength iridium electrodes designed to deliver focused ignition and long service life for 3.1L–4.3L V6 engines.

These replacement spark plugs are engineered to match OEM fitment for many GM and Ford V6 models and a variety of other vehicles. Each plug uses a fine iridium central electrode welded by laser for improved wear resistance and a more concentrated spark, and the set replaces reference numbers such as 7164 and TR55IX. The pack includes six plugs, ideal for full-banked V6 engines, and is backed by IFATRUNK customer support should you need assistance with installation or compatibility.

Which vehicles and engines will these spark plugs fit?

These plugs are compatible with a broad range of GM and Ford V6 applications from late 1980s through the 2010s, plus select Mazda and Mercury models. Compatibility covers 3.0L to 4.3L V6 engines commonly found in Silverado, Sierra, Express, Impala, Buick, Pontiac, Explorer, Mustang, Escape and others. Always verify your engine code and OEM reference numbers before purchase.

• Replaces reference numbers: 7164, TR55IX, 3951, TR55, 3403, TR55GP
• Covers Chevrolet, GMC V6s: 4.3L and 3.4L variants (1996–2013 ranges)
• Includes many Buick, Pontiac, Cadillac V6 models (3.1L–3.8L)
• Fits Ford and Mazda V6 models like Explorer, Mustang, Escape, Tribute

How do iridium electrodes affect ignition and longevity?

Iridium is used because it allows a much smaller, harder electrode tip that resists erosion and concentrates ignition energy. A thinner central electrode yields a more focused spark, which helps deliver consistent combustion over a longer service interval than standard copper tips. Laser welding secures the alloy to the core for improved durability under thermal and electrical stress.

• 0.4–0.6 mm iridium central electrode for focused spark
• Laser-welded construction to reduce tip degradation
• Designed to tolerate higher thermal and electrical loads

Will these spark plugs help with cold starts or fuel efficiency?

While no spark plug can guarantee specific fuel savings, iridium tips help produce a stable, concentrated spark that supports reliable ignition in cold starts and lean-burn conditions. That stability can reduce misfires and uneven combustion, which often translates to smoother startup behavior and steady running. Real-world fuel impact depends on overall engine condition and tuning.

• Improved ignition stability in low-temperature starts
• Better performance with leaner air–fuel mixtures
• Can reduce misfires that waste fuel when engine is out of tune

What should I know about installation and maintenance?

Installation follows standard spark plug replacement procedures: check correct gap (if applicable), torque to manufacturer specification, and replace in matched sets when servicing an entire bank. Use a torque wrench and anti-seize only if recommended by vehicle manufacturer. If you experience fitment or performance questions, IFATRUNK customer support is available to help.

• Pack quantity: 6 pieces — enough for most V6 banks
• Verify OEM reference numbers and engine size before installation
• Follow manufacturer torque settings; inspect ignition coils/wires

Who is this for: IFATRUNK's Iridium Spark Plugs 6 Pack is aimed at DIY mechanics, professional technicians, and vehicle owners who need OEM-compatible replacements for V6 engines in Chevy, GMC, Buick, Pontiac, Ford, Mazda and related models from the 1990s through early 2010s. Choose these plugs if you want a long-lasting iridium tip, reliable ignition under varied conditions, and a full six-plug set for a complete bank replacement. If you're unsure about fitment, compare the listed reference numbers and vehicle years or contact IFATRUNK support for guidance.