Sixity Auto NGK Iridium IX Spark Plugs for Ram 1500 5.7L V8 (2011-2021) — 16‑Piece Kit, Iridium Tip for Improved Throttle Response

High-performance NGK Iridium IX spark plugs in a 16-piece set engineered to restore reliable ignition and improve combustion for Ram 1500 5.7L V8 models from 2011–2021.

These genuine NGK Iridium IX plugs are designed as direct-fit replacements for the HEMI 5.7L V8 in Ram 1500 trucks, offering durable construction and focused spark delivery that help reduce misfires and maintain throttle response. The iridium-tipped center electrode and precision-ground ground electrode work together for consistent ignitability over extended service intervals. Supplied by Sixity Auto, this 16-piece kit covers all cylinders and comes packaged for easy installation at home or in a professional shop.

How will these plugs affect everyday driving and throttle response?

NGK Iridium IX plugs sharpen the spark to promote more complete combustion with each ignition event, which can translate into smoother idle, more responsive throttle feel, and fewer hesitation episodes. Benefits will depend on engine condition, but many users notice improved low-end response after installation.

• Sharper spark focus from iridium tip for consistent ignitions
• Reduced misfires under load and during acceleration
• Stable idle and quicker throttle pickup with properly gapped plugs

Are these a direct fit for my Ram 1500 5.7L V8 (2011–2021)?

Yes — this 16-piece set matches the factory specifications for 5.7L HEMI engines across the listed model years, so you get the correct thread size, seat type, and reach for direct replacement without adapters. Always verify part numbers against your vehicle’s VIN or factory manual before installing.

• Sold as a complete 16-plug set for all cylinders
• Direct-fit threads and reach for the 5.7L HEMI engine family
• Compliant with OEM torque and gap recommendations

How long do NGK Iridium IX plugs typically last and what maintenance is needed?

Iridium tips are engineered for extended service life compared with conventional plugs, helping them maintain a stable gap and reliable spark longer. Lifespan varies with driving patterns and engine health; inspect during routine tune-ups and replace according to vehicle service intervals or if misfires/rough running occur.

• Iridium center electrode for longer service life than standard plugs
• Resistant to gap erosion for sustained spark efficiency
• Inspect during routine maintenance or when troubleshooting ignition issues

What should I expect during installation, and are special tools required?

Installation is straightforward for anyone comfortable working on ignition systems: remove old plugs, check and set gaps if needed, and torque to the vehicle manufacturer’s spec. Use a quality spark-plug socket with a rubber insert or protector to avoid damaging the iridium tip and porcelain insulator.

• Use a torque wrench and the correct spark-plug socket for secure fitment
• Confirm proper gap and thread engagement before final torque
• Follow anti-seize and torque guidelines from NGK or your service manual

Who is this for? These NGK Iridium IX spark plugs from Sixity Auto are aimed at Ram 1500 owners, aftermarket technicians, and DIY mechanics who want a long-lasting, direct-fit ignition upgrade for 5.7L V8 engines from 2011–2021. If you need a complete 16-plug replacement kit that emphasizes reliable sparking, reduced misfires, and durable iridium construction for routine maintenance or performance-oriented tune-ups, this set is an appropriate choice.