NGK Iridium Spark Plugs for Chevrolet Silverado 1500 5.3L/6.2L (2014–2024) — 8-Pack, 0.040" Pre-Gapped Direct-Fit

These NGK Iridium IX spark plugs are engineered to match the factory fitment and firing characteristics of Silverado 1500 V8 engines from 2014 through 2024. Supplied as eight LTR5IX11 units, they use a fine iridium center electrode and corrosion-resistant components to maintain gap stability and consistent ignition performance over time. Designed by NGK, a leading global spark plug manufacturer, this set addresses ignition reliability, misfire reduction, and efficient combustion without modifying engine hardware.

How do these NGK plugs affect ignition and engine response?

Iridium’s high melting point allows a very fine center electrode that focuses the spark, producing a consistent and concentrated spark event. That sharper spark can lead to more complete combustion cycles, reducing the chance of misfires and maintaining steady throttle response under load.

• Fine iridium center electrode for focused spark delivery
• Durable ground electrode to resist gap erosion
• Maintains factory 0.040" gap for correct ignition timing

Will these spark plugs fit my Silverado 1500 and what’s included?

This listing contains eight NGK LTR5IX11 Iridium IX spark plugs specified for Chevrolet Silverado 1500 5.3L and 6.2L V8 models from 2014 through 2024. Each plug ships with the factory-specified 0.040" gap so they are ready for direct installation in compatible engines.

• Fitment: Silverado 1500, 5.3L and 6.2L V8 (2014–2024)
• Quantity: 8 spark plugs (complete set for V8)
• Pre-set gap: 0.040" per manufacturer spec

How do these plugs impact fuel economy and emissions?

A stable, efficient spark improves how thoroughly the air/fuel mixture burns, which can help reduce unburnt hydrocarbons and lower the frequency of misfires. While exact fuel economy and emissions improvements depend on vehicle condition and driving habits, using properly gapped, high-precision plugs supports cleaner combustion compared with worn or eroded plugs.

• Sharper ignition reduces incomplete combustion
• Less fouling and fewer misfires versus degraded plugs
• Corrosion-resistant design helps long-term performance

What are the durability and maintenance considerations?

NGK Iridium IX plugs are built to resist electrode wear and to hold gap specifications longer than conventional plugs. Regular inspection at recommended service intervals helps ensure optimal performance; replace according to vehicle manufacturer guidance or if misfires, rough idle, or diagnostic codes indicate ignition problems.

• Iridium center electrode reduces gap growth over time
• Durable shell plating resists corrosion in harsh environments
• Inspect at routine tune-up intervals or when symptoms appear

Who is this for: Owners and technicians who need a factory-compatible, high-precision spark plug set for Chevrolet Silverado 1500 V8 engines (5.3L and 6.2L) from model years 2014–2024. This 8-pack suits anyone replacing all cylinders at once—DIYers, fleet mechanics, and service shops seeking consistent fitment, a 0.040" gap, and the longevity benefits of an iridium electrode.