Newparts NGK Iridium IX Spark Plug Set 16pc for Chrysler Dodge Jeep Ram 5.7/6.4L V8 — Iridium Tips & Copper Core

High-performance NGK Iridium IX spark plugs in a 16-piece kit designed as a direct replacement for Chrysler, Dodge, Jeep and Ram 5.7L and 6.4L V8 engines.

If you need a full set of replacement spark plugs for V8 applications from 2011–2024, this Newparts-supplied kit contains 16 genuine NGK Iridium IX plugs with factory specifications. Each plug features an iridium-tipped center electrode for long life and consistent spark, a copper core for reliable heat transfer, and a 5/8" hex for straightforward installation. The set arrives in original NGK packaging and is intended to match OEM fitment and performance for listed models.

Will these spark plugs fit my Ram 1500 or other V8 vehicles?

These plugs are specified for many Chrysler/Dodge/Jeep/Ram 5.7L and 6.4L V8 engines across model years 2011–2024. Always verify compatibility by cross-checking your engine size, year and OEM part number before ordering.

• Fits Ram 1500 (2011–2024) with 5.7L V8 where NGK part matches.
• Compatible with select Chrysler, Dodge, Jeep, and other Ram V8 models using the same plug spec.
• Confirm fit with vehicle lookup or OEM part number.

How do these Iridium IX plugs improve performance and longevity?

Iridium center electrodes deliver a finer, more durable spark contact than standard plugs, improving ignition stability while extending service intervals. The copper core assists heat control and contributes to consistent combustion characteristics.

• Iridium tip for extended wear life and stable spark delivery.
• Copper core for efficient heat dissipation and reliable operation.
• Taper-cut ground electrode to optimize flame propagation and ignition consistency.

What are the key specifications I should know before purchasing?

This kit includes plugs built to NGK’s Iridium IX specification: 0.551" thread diameter, 26.5 mm reach, 50.5 mm insulator height, and a pre-gap of 0.044". Heat range and resistance details are included for correct application.

• Thread diameter: 0.551 inches; reach: 26.5 mm; insulator height: 50.5 mm.
• Center electrode: iridium tip over a copper core; ground electrode: taper cut.
• Heat range: manufacturer-specified 5; built-in resistor ~5000 ohms; hex size: 5/8".

What should I expect when installing and maintaining these plugs?

Installation is straightforward for anyone comfortable with basic engine service: torque plugs to manufacturer spec and check gap if necessary. Because iridium tips are long-lived, service intervals are typically longer than for conventional plugs, but regular inspection during tune-ups is still recommended.

• Pre-gapped to 0.044", verify and adjust per vehicle service manual if needed.
• Use a torque wrench and NGK/OEM torque specs to avoid over-tightening.
• Replace in matched sets of 8 or 16 for multi-plug V8 engines to maintain engine balance.

Who is this kit for? If you own a Chrysler, Dodge, Jeep or Ram equipped with a 5.7L or 6.4L V8 and want an OEM-grade, long-life ignition solution, this 16-pack is tailored for full-engine spark plug service. It’s suited to DIY mechanics, professional technicians, fleet operators, and anyone seeking NGK-certified replacement plugs in original packaging for reliable fit, consistent combustion, and reduced maintenance frequency. Always confirm vehicle compatibility with the provided specifications or a fitment lookup before purchase.