16 pc NGK Iridium IX Spark Plugs for Ram 1500 5.7L V8 - Cleaner

In this review of the 16 pc NGK Iridium IX set for the Ram 1500 5.7L V8, the bottom line is simple: these are a practical, OEM-grade replacement for owners who want improved ignition stability and fewer misfires. Installed as a full 16-plug kit, they arrive pre-gapped to 0.044' and match the Dual Plug fitment required by the 2011-2021 Ram 1500 HEMI engines, which makes them a convenient one-stop service part for a tune-up. The most compelling reason to buy is the increased spark efficiency that translates to smoother idle and better throttle response without complicated installation steps.

Key Features

• Genuine NGK Parts: Built to the specifications of a leading spark plug maker so fitment and reliability align with original equipment expectations.
• Reduce Emissions and Misfires: The Iridium IX design promotes complete combustion, which helps lower exhaust emissions and reduce the chance of misfires during operation.
• Durable Shell: A robust shell protects the plug body from damage and corrosion, helping the plugs maintain performance over time.
• Improved Ignition Efficiency: Advanced center and ground electrodes focus the spark for stronger combustion that supports smoother idle and crisper throttle response.
• Damage-Tolerant Electrodes: Electrodes minimize gap growth, preserving ignitability and consistent spark performance through the plug life.
• Complete 16-Piece Kit: Supplied as the full sixteen plugs required for the Ram 1500 5.7L V8, eliminating parts matching and ensuring all cylinders are refreshed at once.

Who It's For

This kit is best for Ram 1500 owners with the 5.7L HEMI V8 from model years shown who want a factory-quality replacement that improves ignition stability and can help with idling smoothness and throttle response. It is a solid choice for regular maintenance intervals or for owners who reached higher mileages and want to refresh all plugs at once.

Those who should look elsewhere include owners of engines other than the specified Ram 1500 5.7L V8 and anyone needing specialty gap settings other than the pre-set 0.044'. Also, if a buyer requires plug types other than Iridium IX or a single-plug purchase, this 16-piece kit may be more than needed.

Pros & Cons

Pros

• Pre-gapped to the correct 0.044' for the 5.7L V8, easing installation and saving time.
• Customers report noticeable improvements in idle smoothness and throttle response after installation.
• Full 16-plug set provides consistent quality across all cylinders and good value compared with buying individual plugs.

Cons

• Sold only as a full 16-piece kit, which may be unnecessary for owners who only need a subset of plugs.
• Fitment is specific to Ram 1500 5.7L V8 years listed, so not universal across other engines.

Specifications

Our Verdict

For Ram 1500 owners with the 5.7L HEMI who want a reliable, OEM-aligned replacement, this 16 pc NGK Iridium IX kit is a straightforward value pick. It refreshes all cylinders at once, arrives pre-gapped to the correct 0.044', and delivers noticeable improvements in idle smoothness and throttle response that make it worthwhile for routine maintenance or higher-mileage tune-ups.

Frequently Asked Questions

Will these plugs fit my Ram 1500?
They are listed for Ram 1500 5.7L V8 models from 2011 through 2021 and are supplied as the 16 plugs required for that engine.

Are the plugs pre-gapped?
Yes, they are shipped pre-gapped to 0.044' which matches the specified gap for the listed Ram 5.7L V8 applications.

Do these improve fuel economy?
Owners have reported smoother combustion and at least one noted an improvement in fuel efficiency, though results will vary by vehicle condition and driving habits.