A-Premium Iridium Platinum Spark Plugs Pack of 6 for V6 3.5L Engines — Fine Wire, 0.032" Gap

A-Premium Iridium Platinum spark plugs (pack of 6) are high-performance replacement plugs engineered for V6 3.5L engines, combining an iridium tip with a platinum core for extended life and reliable ignition.

If your vehicle uses the 3.5L V6 configuration found in many Ford and Lincoln models, these A-Premium fine-wire plugs are a direct-fit replacement option. They match multiple OEM reference numbers and are built for long service intervals, good electrical characteristics, and consistent spark delivery. Below you’ll find the most common buyer questions answered clearly to help confirm fitment and performance expectations.

Which vehicles and part numbers do these spark plugs fit?

These plugs are compatible with a wide range of Ford and Lincoln models that use the 3.5L V6 engine. They list several OEM cross-references so you can verify against your vehicle’s service manual or existing parts.

• Common references: 97177, LTR6CI-8, LTR6CI8, 96780, CYFS12Y3, CYFS12YT3.
• Fits vehicles including F-150 (2011–2019 variations), Explorer (2013–2019), Expedition (2015–2018), Taurus, Transit series, and Lincoln MKS/MKT/Navigator where 3.5L V6 is specified.
• Designed to match the 0.032" pre-set gap used on these engine applications.

What are the technical specs and construction details?

These A-Premium plugs combine an iridium center tip with a platinum core wire and a fine-wire design to produce a concentrated spark. The plug geometry and materials target longevity and stable ignition behavior across a broad service life.

• Center electrode tip: iridium; center electrode core: platinum.
• Resistance: 5000 ohms; gap: 0.032"; hex: 5/8"; reach: 25 mm; thread diameter: 14 mm.
• Insulator height: 53.00 mm — engineered for correct seating and heat transfer in specified engines.

How long will these spark plugs last and when should I replace them?

Iridium and platinum electrodes extend service life compared with conventional nickel plugs, so these units are intended for long intervals. The manufacturer recommends replacement roughly between 80,000 and 100,000 miles under normal driving conditions, though driving habits and engine health can shorten or lengthen that span.

• Recommended interval: 80,000–100,000 miles for optimal performance and longevity.
• Inspect earlier if you notice misfires, rough idle, increased fuel use, or check-engine indicators.
• Always verify torque and gap during installation to prevent damage and maintain performance.

Are these easy to install and what should I check during fitment?

These spark plugs are manufactured to common OEM dimensions for plug-in replacement — reach, thread diameter, and hex size match the listed engines. Basic hand tools and a torque wrench are all that’s required for a proper installation.

• Use a 5/8" socket and torque to the vehicle manufacturer’s specifications.
• Confirm the 0.032" gap and retorque after initial heat cycles if recommended by your service manual.
• Replace ignition boots or coil seals if worn to ensure a clean connection and prevent arcing.

Who this is for: Drivers and DIY mechanics who own Ford or Lincoln vehicles equipped with the 3.5L V6 engine and want a long-life, OEM-dimension replacement spark plug are the primary audience. These A-Premium iridium-platinum plugs suit fleet maintenance managers, performance-minded owners seeking consistent ignition, and anyone replacing worn or fouled plugs on applicable F-150, Explorer, Expedition, Transit, Taurus, or Lincoln models.