A-NAFTULY Iridium Spark Plugs 91418 – 8 Pack for Chevy Silverado 1500, Tahoe, Suburban, GMC Sierra 1500, Yukon

Overview and why it matters

Engineered for GM powertrains, the A-NAFTULY 91418 iridium spark plugs are designed to deliver crisp starts, smooth idle, and reliable ignition across a broad range of GM vehicles from 2014 to 2023. The combination of a 0.6mm finewire iridium centerwire tip and laser-welded construction supports efficient combustion and can help the engine operate more consistently during everyday driving. This plug set is built to replace multiple factory part numbers, including 12622441 and ILTR5E11, among others, making it a practical choice for owners looking to refresh wear components with a single purchase.

Whether you drive a Silverado, Tahoe, Suburban, Camaro, Corvette, or a Cadillac Escalade, these plugs are designed to meet the demands of high-output V8 configurations. The design emphasizes durable materials and stable high-voltage delivery, which can contribute to smoother operation across the engine’s RPM range, especially during acceleration or steady cruising. While results vary by vehicle and conditions, you may notice more consistent ignition behavior and improved throttle response as part of a regular maintenance routine.

Vehicle fitment and compatibility

The fitment covers a broad GM lineup from 2014 through 2023, including Chevrolet Silverado 1500 V8 5.3L/6.2L, Silverado 2500/3500 HD V8 6.6L, Camaro V8 6.2L, Tahoe V8 5.3L/6.2L, Suburban V8 5.3L/6.2L, Corvette V8 6.2L, and Cadillac Escalade/Escalade ESV V8 6.2L. It also accommodates GMC Sierra 1500 V8 5.3/6.2L, Sierra 2500/3500 HD V8 6.6L, Yukon V8 5.3/6.2L, and Yukon XL V8 5.3/6.2L. The set is intended as a direct replacement for multiple reference numbers, including 91418, ILTR5E11, 12598004, 41-114, 12622441, 41-103, 12625058, ILTR5B11, XP3923, and AI3923, offering a versatile option for repair or upgrade projects.

Key benefits at a glance

• 0.6mm iridium finewire tip with laser-welded construction for durable, precise ignition
• Rigorous quality control aimed at reducing misfires, rough idling, stalling, and other ignition-related issues
• Broad GM vehicle compatibility for trucks, SUVs, and performance models in the 2014–2023 window
• Eight-pack packaging with a 12-month warranty and dedicated customer support

What’s included and warranty support

• Set of 8 Iridium Spark Plugs (reference numbers: 91418, ILTR5E11, 12598004, 41-114, 12622441, 41-103, 12625058, ILTR5B11, XP3923, AI3923, 3474)
• 12-month worry-free warranty and access to responsive A-NAFTULY support

Practical notes for daily driving

In routine use, these spark plugs are designed to support efficient combustion and consistent spark delivery. While not a guaranteed performance boost, the design choices emphasize durability and stable ignition across a broad RPM range, which can be a meaningful part of regular maintenance for long-term reliability. Always follow vehicle-specific installation guidelines to ensure proper seating and sealing.