A-Premium Iridium Platinum Spark Plugs for 3.5L V6 Ford/Lincoln — Pack of 6, Fine-Wire Tips, OEM Fit

These spark plugs pair an iridium center electrode with a platinum core to deliver consistent ignition, reduced wear, and long service intervals. Built to OEM-style dimensions with a 0.032" gap, 14 mm thread diameter, and 25 mm reach, this pack replaces common Ford part numbers for many F-150, Explorer, Taurus, Transit and Lincoln applications. The set is rated with 5,000 ohms resistance and a 5/8" hex for easy installation.

Will these spark plugs fit my 3.5L V6 Ford or Lincoln?

Yes — these plugs match the specifications used in numerous 3.5L Ford and Lincoln V6 engines from several model years. They are manufactured to match the thread diameter, reach, insulator height, and gap used by the original parts.

• Compatible models include F-150 (2011–2019 variants), Explorer (2013–2019), Taurus (2010–2019 ranges), Transit-150/250/350 (2015–2019), and select Lincoln MKS/MKT/Navigator years.
• Replaces reference numbers such as 97177, LTR6CI-8 and BL3E-12405-DA among others.
• Pre-set gap: 0.032" to match factory specifications.

How do the iridium tip and platinum core affect performance?

The iridium tip concentrates the spark on a fine point for reliable ignition at lower voltages, while the platinum core increases electrode durability. Together they reduce erosion and help maintain the correct gap over many thousands of miles.

• Fine-wire iridium tip for stable ignition and improved throttle response.
• Platinum core increases electrode life and gap retention.
• 5000 ohm resistor suppresses electrical interference with vehicle electronics.

What are the key specs I should check before buying?

Confirm thread diameter, reach, gap, and hex size to ensure compatibility with your engine and spark plug wells. These plugs are designed with common OEM dimensions to make replacement straightforward for compatible engines.

• Thread diameter: 14 mm; reach: 25 mm; insulator height: 53 mm.
• Hex size: 5/8" for standard socket tools.
• Gap size: 0.032" and resistance: 5000 ohms.

When should I replace these spark plugs?

Iridium-platinum spark plugs are built for long intervals compared with standard copper plugs. For typical driving conditions, manufacturers and technicians commonly recommend changing them around 80,000–100,000 miles, though inspection intervals can vary by use and engine condition.

• Suggested replacement interval: 80,000–100,000 miles under normal driving.
• Inspect earlier if you notice misfires, rough idle, or reduced fuel economy.
• Use proper torque and anti-seize recommendations during installation to avoid damage.

Who is this for: Drivers and technicians who maintain Ford and Lincoln vehicles with the 3.5L V6 engines and want a long-lasting, OEM-dimension replacement option. This A-Premium six-pack suits owners performing scheduled maintenance, fleet managers replacing multiple cylinders, and DIY mechanics who need a durable, precise-fit spark plug that balances longevity with reliable ignition performance.